English-Thai Dictionary
hydro
N พลังงานไฟฟ้า ที่ ได้ จาก พลังงาน น้ำ เครื่อง กำเนิด พลังงานไฟฟ้า ที่ ได้ จาก พลังงาน น้ำ
hydro-
PRF น้ำ nam
hydrocarbon
N สาร ไฮโดรคาร์บอน san-hai-dro-ka-bon
hydrocele
N ถุง บวมน้ำ (เช่น ถุง อัณ ฑะ
hydrocephalus
N ภาวะ ที่ สมอง ขยายตัว และ มี น้ำ ขัง
hydrochloride
N เกลือ ของ กรด เกลือ
hydrodynamics
N วิชา ที่ เกี่ยวกับ แรง ของ การเคลื่อนไหว ของ ของเหลว wi-cha-ti-kiao-kab-raeng-kong kan-kluean-wai kong-kong-leo
hydroelectric
ADJ พลังน้ำ pang-lang-nam
hydroelectric
ADJ เกี่ยวกับ พลังงานไฟฟ้า ที่ ไก ด้ จาก พลังงานไฟฟ้า kiao-kab-pa-lang-ngan-fai-fa
hydrogen
N ก๊าซ ไฮโดรเจน ก๊าซ ไร้ สี และ กลิ่น kas-hai-dro-jen
hydrogen bomb
N ระเบิดไฮโดรเจน ra-boed-hai-dro-jen
hydrogen peroxide
N ของเหลว ไม่ คงที่ ใช้ เป็น ยา ฟอกสี และ ยาฆ่าเชื้อโรค kong-leo-mai-kong-ti-chai-pen-ya-fok-se-lae-ya-ka-chuea-rok
hydrogenate
VT ใส่ ไฮโดรเจน เข้าไป hydrogenize
hydrogenize
VT ใส่ ไฮโดรเจน เข้าไป hydrogenate
hydrogenous
A ที่ ประกอบด้วย ไฮโดรเจน ที่ เกี่ยวกับ ไฮโดรเจน
hydrograph
N กราฟ แสดง ระดับน้ำ และ อัตรา การ ไหล ของ น้ำ เทียบ กับ เวลา kraf-sa-daeng-ra-dab-nam-lae-ad-tra-kan-lai-kong-nam-tiab-kab-we-la
hydrography
N อุทกศาสตร์ u-tok-ka-pai
hydroid
A เกี่ยวกับ สัตว์ พวก Hydrozoa ที่ สืบ พัน ธู์ ด้วย การ แตกหน่อ
hydrokinetic
A เกี่ยวกับ การ เคลื่อนที่ ของ ของเหลว hydrokinetical
hydrological
A เกี่ยวกับ น้ำ
hydrologist
N นักวิทยาศาสตร์ ผู้เชี่ยวชาญ ศึกษา เกี่ยวกับ น้ำ
hydrology
N อุทกวิทยา u-tok-ka-pai
hydrolysis
N การสลายตัว ของ สาร ประกอบด้วย การ เติม น้ำ ปฏิ กริยา การ รวมตัว ของ น้ำ กับ เกลือ แล้ว เกิด กรด และ เบส
hydrolytic
A เกี่ยวกับ ปฏิ กริยา ไฮโดรไล ซิ ส
hydromancy
N การ ทำนาย จาก ลักษณะเฉพาะ ของ น้ำ
hydromechanics
N วิชา ที่ ศึกษา เกี่ยวกับ แรง ของ การ เคลื่อนตัว ของเหลว และ ของแข็ง ใน ของเหลว hydrodynamics
hydromel
N ของเหลว ที่ กลายเป็น เหล้า น้ำผึ้ง ประกอบด้วย น้ำผึ้ง และ น้ำ
hydrometallurgy
N กระบวนการ และ เทคนิค การสกัด โลหะ ที่ อุณ หภูมิ ห้อง ด้วย การละลาย ด้วย ของเหลว
hydrometeor
N ลักษณะ ของ น้ำ หรือ น้ำแข็ง ใน บรรยากาศ (เช่น หมอก ลูกเห็บ เป็นต้น
hydrometer
N เครื่องมือวัด ความถ่วงจำเพาะ ของ ของเหลว เครื่องมือวัด ความแรง ของ เหล้า
hydropathy
N การ บำบัดรักษา ด้วย น้ำ
hydrophane
N พลอย สีเหลืองช นิดหนึ่ง ที่จะ ใส ขึ้น เมื่อ นำ ลง น้ำ
hydrophobia
N โรค พิษสุนัขบ้า โรคกลัวน้ำ rok-phid-su-nak-ba
hydrophobic
A ที่ ไม่ ชอบ น้ำ เกี่ยวกับ โรคกลัวน้ำ
hydrophyte
N พืชน้ำ พืช ที่ ชอบ ที่ ชื้น
hydropical
A เกี่ยวกับ การ บวมน้ำ hydropic
hydroplane
N เครื่องบิน ที่ แล่น บน น้ำ ได้ krueang-bin-ti-laen-bon-nam-dai
hydropower
N พลังน้ำ pang-lang-ngan
hydroquinone
N ยา ที่ สามารถ ลบ สาร สี บน ผิวหนัง ได้ hydroquinol quinol
hydroscope
N เครื่อง ส่อง ดู ภาพ ใต้ น้ำ
hydrosphere
N น้ำ บริเวณ รอบ พื้นผิว โลก และ ใน บรรยากาศ
hydrostat
N เครื่องไฟฟ้า ที่ ใช้ ตรวจวัด น้ำ เครื่อง ควบคุม ระดับความสูง ของเหลว
hydrostatics
N การศึกษา สมบัติ ทางกายภาพ ของ น้ำ หรือ ของเหลว (ทั้ง สภาวะ ปกติ และ ภายใต้ ความดัน
hydrosulphate
N เกลือ ที่เกิด จาก การ รวมตัว ของ กรดกำมะถัน และ เบส hydrosulfate
hydrosulphide
N สารประกอบ ที่ มี หมู่ HS hydrosulfide
hydrosulphite
N เกลือ ของ กรด ไฮ โป ซัลฟิวรัส โซเดียม ไท โอ ซัลเฟต hydrosulfite hyposulphite hyposulfite
hydrotherapeutics
N การ บำบัดรักษา ด้วย น้ำ hydrotherary
hydrotherapy
N การ บำบัดรักษา ด้วย น้ำ hydrotherapeutics
hydrothermal
A เกี่ยวกับ น้ำ ที่ มี อุณ หภูมิ สูง หรือ ร้อน
hydrothorax
N ภาวะ โพรงเยื่อหุ้มปอด มี ของเหลว คั่ง อยู่
hydrotropic
A ที่ เข้าหา หรือ ห่าง ออกจาก น้ำ หรือ ความชื้น เกี่ยวกับ น้ำ โดยเฉพาะ
hydrotropism
N ปฏิ กริยา ของ การ ชอบ หรือ เข้าหา น้ำ
hydrous
A ที่ ประกอบด้วย น้ำ
hydroxide
N สารประกอบ ที่ ประกอบด้วย หมู่ OH(ไฮดร อก ซิ ล
hydroxyl
N กลุ่ม ประกอบด้วย ไฮโดรเจน และ ออกซิเจน อย่าง ละ หนึ่ง อะตอม
hydrozoa
N ประเภท หนึ่ง ของ สัตว์ ที่ ไม่มี กระดูกสันหลัง
Webster's 1828 Dictionary
HYDROIDIC
a.[hydrogen and iodic. ] Denoting a peculiar acid or gaseous substance, produced by the combination of hydrogen and iodine.
HYDROCARBONATE
n.[Gr. water, or rather hydrogen, and L. carbo, a coal. ] Carbureted hydrogen gas, or heavy inflammable air.
HYDROCARBURET
n.Carbureted hydrogen.
HYDROCELE
n.[Gr. water, and tumor. ] Any hernia proceeding from water; a watery tumor, particularly one in the scrotum. A dropsy of the scrotum.
HYDROCEPHALUS
n.[Gr. water, and the head. ] Dropsy of the head; a preternatural distension of the head by a stagnation and extravasation of the lymph, either within or without the cranium.
HYDROCHLORATE
n.A compound of hydrochloric acid and a base; a muriate.
HYDROCHLORIC
a.[hydrogen and chloric. ] Hydrochloric acid is muriatic acid gas, a compound of chlorine and hydrogen gas.
HYDROCYANATE
n.Prussiate; cyanuret.
HYDROCYANIC
a.[Gr. water, or rather hydrogen, and blue. ] The hydrocyanic acid is the same as the prussic acid.
HYDRODYNAMIC
a.[Gr. water, and power, force. ] Pertaining to the force or pressure of water.
HYDRODYNAMICS
n.That branch of natural philosophy which treat of the phenomena of water and other fluids, whether in motion or at rest; of their equilibrium, motion, cohesion, pressure, resistance, etc. It comprehends both hydrostatics and hydraulics.
HYDROFLUATE
n.A compound of hydrofluoric acid and a base.
HYDROFLUORIC
a.[Gr. water. ] Consisting of fluorin and hydrogen. The hydrofluoric acid is obtained by distilling a mixture of one part of the purest fluor spar in fine powder, with two of sulphuric acid.
HYDROGEN
n.[Gr. water, and to generate; so called as being considered the generator of water. ] In Chimistry, a gas which constitutes one of the elements of water, of which it is said by Lavoisier to form fifteen parts in a hundred; but according to Berzelius and Dulong, hydrogen gas is 11.1 parts in a hundred, and oxygen 88.9. Hydrogen gas is an aeriform fluid, the lightest body known, and though extremely inflammable itself, it extinguishes burning bodies, and is fatal to animal life. Its specific gravity is . 694, that of air being 1. . In consequence of its extreme lightness, it is employed for filling air balloons.
HYDROGENATE
v.t.To combine hydrogen with any thing.
HYDROGENATED
pp. In combination with hydrogen.
HYDROGENIZE
v.t.To combine with hydrogen.
HYDROGENIZED
pp. Combined with hydrogen.
HYDROGENIZING
ppr. Combining with hydrogen.
HYDROGRAPHER
n.[See Hydrography. ] One who draws maps of the sea, lakes or other waters, with the adjacent shores; one who describes the sea or other waters.
HYDROGRAPHIC, HYDROGRAPHICAL
a.Relating to or containing a description of the sea, sea coast, isles, shoals, depth of water, etc. or of a lake.
HYDROGRAPHY
n.[Gr. water, and to describe. ] The art of measuring and describing the sea, lakes, rivers and other waters; or the art of forming charts, exhibiting a representation of the sea coast, gulfs, bays, isles, promontories, channels, soundings, etc.
HYDROGURET
n.A compound of hydrogen with a base. Hydroguret is now scarcely used, except to give the derivative hydrogureted.
HYDROGURETED
a.Denoting a compound of hydrogen with a base.
HYDROLITE
n.[Gr. water, and a stone. ] A mineral whose crystals are described as six sided prisms, terminated by low six sided pyramids, with truncated summits.
HYDROLOGICAL
a.Pertaining to hydrology.
HYDROLOGY
n.[Gr. water, and discourse. ] The science of water, its properties and phenomena.
HYDROMANCY
n.[Gr. water and divination. ] A method of divination or prediction of events by water; invested, according to Varro, by the Persians, and practiced by the Romans.
HYDROMANTIC
a.Pertaining to divination by water.
HYDROMEL
n.[Gr. water, and honey. ] A liquor consisting of honey diluted in water. Before fermentation, it is called simple hydromel; after fermentation, it is called vinous hydromel or mead.
HYDROMETER
n.[See Hydrometry. ] An instrument to measure the gravity, density, velocity, force, etc. of water and other fluids, and the strength of spirituous liquors.
HYDROMETRIC, HYDROMETRICAL
a.Pertaining to a hydrometer, or to the measurement of the gravity, etc. of fluids. 1. Made by a hydrometer.
HYDROMETRY
n.[Gr. water, and measure. ] The art of measuring, or the mensuration of the gravity, density, velocity, force, etc. of fluids, and the strength of rectified spirits.
HYDRO-OXYD
n.[Gr. water, and oxyd. ] A metallic oxyd combined with water; a metallic hydrate.
HYDROPHANE
n.[Gr. water, and to show. ] In mineralogy, a variety of opal made transparent by immersion in water.
HYDROPHANOUS
a.Made transparent by immersion in water.
HYDROPHOBIA, HYDROPHOBY
n.[Gr. water, and to fear. ] A preternatural dread of water; a symptom of canine madness, or the disease itself, which is thus denominated. This dread of water sometimes takes place in violent inflammations to the stomach, and in hysteric fits.
HYDROPHOBIC
a.Pertaining to a dread of water, or canine madness.
HYDROPIC, HYDROPICAL
a.[L. hydrops; Gr. dropsy; water. ] 1. Dropsical; diseased with extravasated water.
2. Containing water; caused by extravasated water; as a hydropic swelling.
3. Resembling dropsy.
Every lust is a kind of hydropic distemper, and the more we drink the more we shall thirst.
HYDROPNEUMATIC
a.[Gr. water, and inflated, breath, spirit. ] An epithet given to a vessel of water, with other apparatus for chimical experiments.
HYDROPSY
[See Dropsy. ]
HYDROSCOPE
n.[Gr. water, and to view. ] A kind of water clock, or instrument used anciently for measuring time, consisting of a cylindrical tube, conical at the bottom, perforated at the vertex, and the whole tube graduated.
HYDROSTATIC, HYDROSTATICAL
a.[Gr. water, and static, standing or settling. ] Relating to the science of weighing fluids, or hydrostatics.
HYDROSTATICALLY
adv. According to hydrostatics, or to hydrostatic principles.
HYDROSTATICS
n.The science which treats of the weight, motion, and equilibriums of fluids, or of the specific gravity and other properties of fluids, particularly of water. Hydrostatics is that branch of the science of hydrodynamics which treats of the properties of fluids at rest.
HYDROSULPHATE
n.The same as hydrosulphuret.
HYDROSULPHURET
n.[hydrogen and sulphuret. ] A combination of sulphureted hydrogen with an earth, alkali or metallic oxyd.
HYDROSULPHURETED
a.Combined with sulphureted hydrogen. Hydrosulphuric acid, is called also hydrothionic acid, or sulphureted hydrogen.
HYDROTHORAX
n.[Gr. water. ] Dropsy in the chest.
HYDROTIC
a.[Gr. water. ] Causing a discharge of water.
HYDROTIC
n.A medicine that purges off water or phlegm.
HYDROXANTHATE
n.[Gr. water, and yellow. ] In chimistry, a compound of hydroxanthic acid with a base.
HYDROXANTHIC
a.A term used to denote a new acid, formed by the action of alkalies on the bisulphuret of carbon. It is called also carbo-sulphuric acid.
Webster's 1913 Dictionary
HYDRO-; HYDR-
HYDRO-; HYDR- Hy "dro-, Hy "dr-.
1. A combining form from Gr. Hydra ).
2. (Chem. )
Defn: A combining form of hydrogen, indicating hydrogen as an ingredient, as hydrochloric; or a reduction product obtained by hydrogen, as hydroquinone.
HYDRO-AEROPLANE
HYDRO-AEROPLANE Hy "dro-a "ër *o *plane `. (Aëronautics )
Defn: An aëroplane with a boatlike or other understructure that enables it to travel on, or to rise from the surface of, a body of water by its own motive power.
HYDROBAROMETER
Hy `dro *ba *rom "e *ter, n. Etym: [Hydro-, 1 + barometer. ]
Defn: An instrument for determining the depth of the sea water by its pressure.
HYDROBILIRUBIN
Hy `dro *bil `i *ru "bin, n. Etym: [Hydro-, 2 + bilirubin. ] (Physiol.Chem. )
Defn: A body formed from bilirubin, identical with urobilin.
HYDROBIPLANE
HYDROBIPLANE Hy "dro *bi "plane, n.
Defn: A hydro-aëroplane having two supporting planes.
HYDROBRANCHIATA
Hy `dro *bran `chi *a "ta, n. pl. Etym: [NL. , fr. Gr. "y `dwr water +(Zoöl.)
Defn: An extensive artificial division of gastropod mollusks, including those that breathe by gills, as contrasted with the Pulmonifera. -- Hy `dro *bran "chi *ate, a.
HYDROBROMATE
HYDROBROMATE Hy `dro *bro "mate, n. (Chem. )
Defn: Same as Hydrobromide.
HYDROBROMIC
Hy `dro *bro "mic, a. Etym: [Hydro-, 2 + bromic. ] (Chem. )
Defn: Composed of hydrogen and bromine; as, hydrobromic acid. Hydrobromic acid (Chem. ), a colorless, pungent, corrosive gas, HBr, usually collected as a solution in water. It resembles hydrochloric acid, but is weaker and less stable. Called also hydrogen bromide.
HYDROBROMIDE
HYDROBROMIDE Hy `dro *bro "mide, n. (Chem. )
Defn: A compound of hydrobromic acid with a base; -- distinguished from a bromide, in which only the bromine unites with the base.
HYDROCARBON
Hy `dro *car "bon, n. Etym: [Hydro-, 2 + carbon. ] (Chem. )
Defn: A compound containing only hydrogen and carbon, as methane, benzene, etc. ; also, by extension, any of their derivatives. Hydrocarbon burner, furnace, stove, a burner, furnace, or stove with which liquid fuel, as petroleum, is used.
HYDROCARBONACEOUS
HYDROCARBONACEOUS Hy `dro *car `bo *na "ceous, a.
Defn: Of the nature, or containing, hydrocarbons.
HYDROCARBONATE
HYDROCARBONATE Hy `dro *car "bon *ate, n.(a ) (Old Chem. ) A hydrocarbon. [Obs. ] (b ) (Chem. ) A hydrous carbonate, as malachite.
HYDROCARBOSTYRIL
Hy `dro *car `bo *sty "ril, n. Etym: [Hydro-, 2 + carbostyril. ] (Chem. )
Defn: A white, crystalline, nitrogenous hydrocarbon, C9H9NO, obtained from certain derivatives of cinnamic acid and closely related to quinoline and carbostyril.
HYDROCARBURET
Hy `dro *car "bu *ret, n. Etym: [Hydro-, 2 + carburet. ] (Chem. )
Defn: Carbureted hydrogen; also, a hydrocarbon. [Obs. ]
HYDROCAULUS
Hy `dro *cau "lus, n.; pl. Hydrocauli. Etym: [NL. , fr. Gr. "y `dwr water + (Zoöl.)
Defn: The hollow stem of a hydroid, either simple or branched. See Illust. of Gymnoblastea and Hydroidea.
HYDROCELE
Hy `dro *cele, n. Etym: [L., fr. Gr. "y `dwr water + (Med. )
Defn: A collection of serous fluid in the areolar texture of the scrotum or in the coverings, especially in the serous sac, investing the testicle or the spermatic cord; dropsy of the testicle.
HYDROCEPHALIC
HYDROCEPHALIC Hy `dro *ce *phal "ic, a.
Defn: Relating to, or connected with, hydrocephalus, or dropsy of the brain.
HYDROCEPHALOID
Hy `dro *ceph "a *loid, a. Etym: [Hydrocephalus + -oid.] (Med. )
Defn: Resembling hydrocephalus. Hydrocephaloid affection (Med. ), the group of symptoms which follow exhausting diarrhea in young children, resembling those of acute hydrocephalus, or tubercular meningitis.
HYDROCEPHALOUS
HYDROCEPHALOUS Hy `dro *ceph "a *lous, a.
Defn: Having hydrocephalus. "Hydrocephalous offspring. " G. Eliot.
HYDROCEPHALUS
Hy `dro *ceph "a *lus, n. Etym: [NL. , fr. Gr. "y `dwr water + (Med. )
Defn: An accumulation of liquid within the cavity of the cranium, especially within the ventricles of the brain; dropsy of the brain. It is due usually to tubercular meningitis. When it occurs in infancy, it often enlarges the head enormously.
HYDROCHLORATE
HYDROCHLORATE Hy `dro *chlo "rate, n. (Chem. )
Defn: Same as Hydrochloride.
HYDROCHLORIC
Hy `dro *chlo "ric, a. Etym: [Hydro-, 2 + hloric: cf. F.hydrochlorique.] (Chem. )
Defn: Pertaining to, or compounded of, chlorine and hydrogen gas; as, hydrochloric acid; chlorhydric. Hydrochloric acid (Chem. ), hydrogen chloride; a colorless, corrosive gas, HCl, of pungent, suffocating odor. It is made in great quantities in the soda process, by the action of sulphuric acid on common salt. It has a great affinity for water, and the commercial article is a strong solution of the gas in water. It is a typical acid, and is an indispensable agent in commercial and general chemical work. Called also muriatic, and chlorhydric, acid.
HYDROCHLORIDE
HYDROCHLORIDE Hy `dro *chlo "ride, n. (Chem. )
Defn: A compound of hydrochloric acid with a base; -- distinguished from a chloride, where only chlorine unites with the base.
HYDROCORALLIA
Hy `dro *co *ral "li *a, n. pl. Etym: [NL. See Hydra, and Coral. ] (Zoöl.)
Defn: A division of Hydroidea, including those genera that secrete a stony coral, as Millepora and Stylaster. Two forms of zooids in life project from small pores in the coral and resemble those of other hydroids. See Millepora.
HYDROCYANATE
HYDROCYANATE Hy `dro *cy "a *nate, n. (Chem. )
Defn: See Hydrocyanide.
HYDROCYANIC
Hy `dro *cy *an "ic, a. Etym: [Hydro-, 2 + anic: cf. F. hydrocyanique.](Chem. )
Defn: Pertaining to, or derived from the combination of, hydrogen and cyanogen. Hydrocyanic acid (Chem. ), a colorless, mobile, volatile liquid, HCN, having a characteristic peach-blossom odor. It is one of the most deadly poisons. It is made by the action of sulphuric acid on yellow prussiate of potassium (potassium ferrocyanide ), and chemically resembles hydrochloric and hydrobromic acids. Called also prussic acid, hydrogen cyanide, etc.
HYDROCYANIDE
HYDROCYANIDE Hy `dro *cy "a *nide, n. (Chem. )
Defn: A compound of hydrocyanic acid with a base; -- distinguished from a cyanide, in which only the cyanogen so combines.
HYDRODYNAMIC; HYDRODYNAMICAL
Hy `dro *dy *nam "ic, Hy `dro *dy *nam "ic *al, a. Etym: [Hydro-, 1 + dynamic, -ical: cf. F. hydrodynamique.]
Defn: Pertaining to, or derived from, the dynamical action of water of a liquid; of or pertaining to water power. Hydrodynamic friction, friction produced by the viscosity of a liquid in motion.
HYDRODYNAMICS
Hy `dro *dy *nam "ics, n. Etym: [Hydro-, 1 + dynamics: cf. F.hydrodynamique.]
Defn: That branch of the science of mechanics which relates to fluids, or, as usually limited, which treats of the laws of motion and action of nonelastic fluids, whether as investigated mathematically, or by observation and experiment; the principles of dynamics, as applied to water and other fluids.
Note: The word is sometimes used as a general term, including both hydrostatics and hydraulics, together with pneumatics and acoustics. See Hydraulics.
HYDRODYNAMOMETER
Hy `dro *dy `na *mom "e *ter, n. Etym: [Hydro-, 1 + dynamometer. ]
Defn: An instrument to measure the velocity of a liquid current by the force of its impact.
HYDRO-ELECTRIC
Hy `dro-e *lec "tric, a. Etym: [Hydro-, 1 + electric. ]
Defn: Pertaining to, employed in, or produced by, the evolution of electricity by means of a battery in which water or steam is used. Hydro-electric machine (Physics ), an apparatus invented by Sir William Armstrong of England for generating electricity by the escape of high-pressure steam from a series of jets connected with a strong boiler, in which the steam is produced.
HYDRO-EXTRACTOR
Hy `dro-ex *tract "or, n. Etym: [Hydro-, 1 + extractor. ]
Defn: An apparatus for drying anything, as yarn, cloth, sugar, etc. , by centrifugal force; a centrifugal.
HYDROFERRICYANIC
Hy `dro *fer `ri *cy *an "ic, n. Etym: [Hydro-, 2 + ferricyanic. ] (Chem. )
Defn: Pertaining to, or containing, or obtained from, hydrogen, ferric iron, and cyanogen; as, hydroferricyanic acid. See Ferricyanic.
HYDROFERROCYANIC
Hy `dro *fer `ro *cy *an "ic, a. Etym: [Hydro-, 2 + ferrocyanic. ] (Chem. )
Defn: Pertaining to, or containing, or obtained from, hydrogen, ferrous iron, and cyanogen; as, hydroferrocyanic acid. See Ferrocyanic.
HYDROFLUATE
HYDROFLUATE Hy `dro *flu "ate, n. (Chem. )
Defn: A supposed compound of hydrofluoris acid and a base; a fluoride. [Archaic ]
HYDROFLUORIC
Hy `dro *flu *or "ic, a. Etym: [Hydro-, 2 + fluoric. ] (Chem. )
Defn: Pertaining to, or containing, hydrogen and fluorine; fluohydric; as, hydrofluoric acid. Hydrofluoric acid (Chem. ), a colorless, mobile, volatile liquid, HF, very corrosive in its action, and having a strong, pungent, suffocating odor. It is produced by the action of sulphuric acid on fluorite, and is usually collected as a solution in water. It attacks all silicates, as glass or porcelain, is the agent employed in etching glass, and is preserved only in vessels of platinum, lead, caoutchouc, or gutta-percha.
HYDROFLUOSILICATE
HYDROFLUOSILICATE Hy `dro *flu `o *sil "i *cate, n. (Chem. )
Defn: A salt of hydrofluosilic acid; a silicofluoride. See Silicofluoride.
HYDROFLUOSILICIC
Hy `dro *flu `o *si *lic "ic, a. Etym: [Hydro-, 2 + fluorine + silicic. ](Chem. )
Defn: Pertaining to, or denoting, a compound consisting of a double fluoride of hydrogen and silicon; silicofluoric. See Silicofluoric.
HYDROGALVANIC
Hy `dro *gal *van "ic, a. Etym: [Hydro-, 1 + galvanic. ]
Defn: Pertaining to, produced by, or consisting of, electricity evolved by the action or use of fluids; as, hydrogalvanic currents. [R.]
HYDROGEN
Hy "dro *gen, n. Etym: [Hydro-, 1 + -gen: cf. F. hydrogène. So called because water is generated by its combustion. See Hydra. ] (Chem. )
Defn: A gaseous element, colorless, tasteless, and odorless, the lightest known substance, being fourteen and a half times lighter than air (hence its use in filling balloons ), and over eleven thousand times lighter than water. It is very abundant, being an ingredient of water and of many other substances, especially those of animal or vegetable origin. It may by produced in many ways, but is chiefly obtained by the action of acids (as sulphuric ) on metals, as zinc, iron, etc. It is very inflammable, and is an ingredient of coal gas and water gas. It is standard of chemical equivalents or combining weights, and also of valence, being the typical monad. Symbol H. Atomic weight 1.
Note: Although a gas, hydrogen is chemically similar to the metals in its nature, having the properties of a weak base. It is, in all acids, the base which is replaced by metals and basic radicals to form salts. Like all other gases, it is condensed by great cold and pressure to a liquid which freezes and solidifies by its own evaporation. It is absorbed in large quantities by certain metals (esp. palladium ), forming alloy-like compounds; hence, in view of quasi-metallic nature, it is sometimes called hydrogenium. It is the typical reducing agent, as opposed to oxidizers, as oxygen, chlorine, etc. Bicarbureted hydrogen, an old name for ethylene. -- Carbureted hydrogen gas. See under Carbureted. -- Hydrogen dioxide, a thick, colorless liquid, H2O2, resembling water, but having a bitter, sour taste, produced by the action of acids on barium peroxide. It decomposes into water and oxygen, and is manufactured in large quantities for an oxidizing and bleaching agent. Called also oxygenated water. -- Hydrogen oxide, a chemical name for water, H -- Hydrogen sulphide, a colorless inflammable gas, H2S, having the characteristic odor of bad eggs, and found in many mineral springs. It is produced by the action of acids on metallic sulphides, and is an important chemical reagent. Called also sulphureted hydrogen.
HYDROGENATE
Hy "dro *gen *ate, v. t. [imp. & p. p. Hydrogenated; p. pr. & vb. n.Hydrogenating.] (Chem. )
Defn: To hydrogenize.
HYDROGENATION
HYDROGENATION Hy `dro *gen *a "tion, n. (Chem. )
Defn: The act of combining with hydrogen, or the state of being so combined.
HYDROGENIDE
HYDROGENIDE Hy "dro *gen *ide, n. (Chem. )
Defn: A binary compound containing hydrogen; a hydride. [R.] See Hydride.
HYDROGENIUM
Hy `dro *ge "ni *um, n. Etym: [NL. See Hydrogen. ] (Chem. )
Defn: Hydrogen; -- called also in view of its supposed metallic nature. Graham.
HYDROGENIZE
Hy "dro *gen *ize, v. t. [imp. & p. p. Hydrogenized; p. pr. & vb. n.Hydrogenizing. ] (Chem. )
Defn: To combine with hydrogen; to treat with, or subject to the action of, hydrogen; to reduce; -- contrasted with oxidize.
HYDROGENOUS
HYDROGENOUS Hy *drog "e *nous, a.
Defn: Of or pertaining to hydrogen; containing hydrogen.
HYDROGNOSY
Hy *drog "no *sy, n. Etym: [Hydro-, 1 + Gr.
Defn: A treatise upon, or a history and description of, the water of the earth.
HYDROGODE
Hy "drog *ode, n. Etym: [Hydrogen + Gr. (Elec.)
Defn: The negative pole or cathode. [R.]
HYDROGRAPHER
HYDROGRAPHER Hy *drog "ra *pher, n.
Defn: One skilled in the hydrography; one who surveys, or draws maps or charts of, the sea, lakes, or other waters, with the adjacent shores; one who describes the sea or other waters. Boyle.
HYDROGRAPHIC; HYDROGRAPHICAL
HYDROGRAPHIC; HYDROGRAPHICAL Hy `dro *graph "ic, Hy `dro *graph "ic *al, a.
Defn: Of or relating to hydrography.
HYDROGRAPHY
Hy *drog "ra *phy, n. Etym: [Hydro-, 1 + -graphy: cf. F. hydrographie.]
1. The art of measuring and describing the sea, lakes, rivers, and other waters, with their phenomena.
2. That branch of surveying which embraces the determination of the contour of the bottom of a harbor or other sheet of water, the depth of soundings, the position of channels and shoals, with the construction of charts exhibiting these particulars.
HYDROGURET
Hy *drog "u *ret, n. Etym: [From Hydrogen. ] (Chem. )
Defn: A hydride. [Obs. ]
HYDROID
Hy "droid, a. Etym: [Hydra + -oid.] (Zoöl.)
Defn: Related to, or resembling, the hydra; of or pertaining to the Hydroidea. -- n.
Defn: One of the Hydroideas.
HYDROIDEA
Hy *droi "de *a, n. pl. Etym: [NL. See Hydra, and -oid.] (Zoöl.)
Defn: An extensive order of Hydrozoa or Acalephæ. [Written also Hydroida.]
Note: This order includes the hydras and the free-swimming hydromedusæ, together with a great variety of marine attached hydroids, many of which grow up into large, elegantly branched forms, consisting of a vast number of zooids (hydranths, gonophores, etc. ),united by hollow stems. All the zooids of a colony are produced from one primary zooid, by successive buddings. The Siphonophora have also been included in this order by some writers. See Gymnoblastea, Hydromedusa, Gonosome, Gonotheca.
HYDROKINETIC
Hy `dro *ki *net "ic, a. Etym: [Hydro-, 1 + kinetic. ]
Defn: Of or pertaining to the motions of fluids, or the forces which produce or affect such motions; -- opposed to hydrostatic. Sir W. Thomson.
HYDROLOGICAL
HYDROLOGICAL Hy `dro *log "ic *al, a.
Defn: Of or pertaining to hydrology.
HYDROLOGIST
HYDROLOGIST Hy *drol "o *gist, n.
Defn: One skilled in hydrology.
HYDROLOGY
Hy *drol "o *gy, n. Etym: [Hydro-, 1 + -logy: cf. F. hydrologie. ]
Defn: The science of water, its properties, phenomena, and distribution over the earth's surface.
HYDROLYSIS
HYDROLYSIS Hy *drol "y *sis, n. [Hydro-, 1 + -lysis. ] (Chem. )
Defn: A chemical process involving the addition of the elements of water.
HYDROLYTIC
Hy `dro *lyt "ic, a. Etym: [Hydro-, 1 + Gr. (Chem. )
Defn: Tending to remove or separate water; eliminating water. Hydrolytic agents, such as sulphuric acid or caustic alkali. Encyc. Brit. Hydrolitic ferment (Physiol. Chem. ), a ferment, enzyme, or chemical ferment, which acts only in the presence of water, and which causes the substance acted upon to take up a molecule of water. Thus, diastase of malt, ptyalin of saliva, and boiling dilute sulphuric acid all convert starch by hydration into dextrin and sugar. Nearly all of the digestive ferments are hydrolytic in their action.
HYDROMAGNESITE
Hy `dro *mag "ne *site, n. Etym: [Hydro-, 1 + magnesite. ] (Min. )
Defn: A hydrous carbonate of magnesia occurring in white, early, amorphous masses.
HYDROMANCY
Hy "dro *man `cy, n. Etym: [Hydro-, 1 + -mancy: cf. F. hydromancie.]
Defn: Divination by means of water, -- practiced by the ancients.
HYDROMANTIC
Hy `dro *man "tic, a. Etym: [Cf. F. hydromantique.]
Defn: Of or pertaining to divination by water.
HYDROMECHANICS
Hy `dro *me *chan "ics, n. Etym: [Hydro-, 1 + mechanics. ]
Defn: That branch of physics which treats of the mechanics of liquids, or of their laws of equilibrium and of motion.
HYDROMEDUSA
Hy `dro *me *du "sa, n.; pl. Hydromedusæ. Etym: [NL. See Hydra, and Medusa. ] (Zoöl.)
Defn: Any medusa or jellyfish which is produced by budding from a hydroid. They are called also Craspedota, and naked-eyed medusæ.
Note: Such medusæ are the reproductive zooids or gonophores, either male or female, of the hydroid from which they arise, whether they become free or remain attached to the hydroid colony. They in turn produce the eggs from which the hydroids are developed. The name is also applied to other similar medusæ which are not known to bud from a hydroid colony, and even to some which are known to develop directly from the eggs, but which in structure agree essentially with those produced from hydroids. See Hydroidea, and Gymnoblastea.
HYDROMEL
Hy "dro *mel, n. Etym: [L. hydromel, hydromeli, Gr. hydromel. ]
Defn: A liquor consisting of honey diluted in water, and after fermentation called mead.
HYDROMELLONIC
HYDROMELLONIC Hy `dro *mel *lon "ic, a.
Defn: See Cyamellone.
HYDROMETALLURGICAL
HYDROMETALLURGICAL Hy `dro *met `al *lur "gic *al, a.
Defn: Of or pertaining to hydrometallurgy; involving the use of liquid reagents in the treatment or reduction of ores. -- Hy `dro *met `al *lur "gic *al *ly, adv.
HYDROMETALLURGY
Hy `dro *met "al *lur `gy, n. Etym: [Hydro-, 1 + metallurgy. ]
Defn: The art or process of assaying or reducing ores by means of liquid reagents.
HYDROMETEOR
Hy `dro *me "te *or, n. Etym: [Hydro-, 1 + meteor. ]
Defn: A meteor or atmospheric phenomenon dependent upon the vapor of water; -- in the pl. , a general term for the whole aqueous phenomena of the atmosphere, as rain, snow, hail, etc. Nichol.
HYDROMETEOROLOGICAL
HYDROMETEOROLOGICAL Hy `dro *me `te *or `o *log "ic *al, a.
Defn: Of or pertaining to hydrometeorology, or to rain, clouds, storms, etc.
HYDROMETEOROLOGY
Hy `dro *me `te *or *ol "o *gy, n. Etym: [Hydro-, 1 + meteorology. ]
Defn: That branch of meteorology which relates to, or treats of, water in the atmosphere, or its phenomena, as rain, clouds, snow, hail, storms, etc.
HYDROMETER
Hy *drom "e *ter, n. Etym: [Hydro-, 1 + -meter: cf. F. hydromètre.]
1. (Physics )
Defn: An instrument for determining the specific gravities of liquids, and thence the strength spirituous liquors, saline solutions, etc.
Note: It is usually made of glass with a graduated stem, and indicates the specific gravity of a liquid by the depth to which it sinks in it, the zero of the scale marking the depth to which it sinks in pure water. Extra weights are sometimes used to adapt the scale to liquids of different densities.
2. An instrument, variously constructed, used for measuring the velocity or discharge of water, as in rivers, from reservoirs, etc. , and called by various specific names according to its construction or use, as tachometer, rheometer, hydrometer, pendulum, etc. ; a current gauge.
HYDROMETRIC; HYDROMETRICAL
Hy `dro *met "ric, Hy `dro *met "ric *al, a. Etym: [Cf. F. hydromètrique.]
1. Of or pertaining to an hydrometer, or to the determination of the specific gravity of fluids.
2. Of or pertaining to measurement of the velocity, discharge, etc. , of running water.
3. Made by means of an hydrometer; as, hydrometric observations. Hydrometric pendulum, a species of hydrometer consisting of a hollow ball of ivory or metal suspended by a treated from the center of a graduated quadrant, and held in a stream to measure the velocity of the water by the inclination given to the thread; a kind of current gauge.
HYDROMETROGRAPH
Hy `dro *met "ro *graph, n. Etym: [Hydro-, 1 + Gr. graph. ]
Defn: An instrument for determining and recording the quantity of water discharged from a pipe, orifice, etc. , in a given time.
HYDROMETRY
Hy *drom "e *try, n. Etym: [Cf. F. hydromètrique.]
1. The art of determining the specific gravity of liquids, and thence the strength of spirituous liquors, saline solutions, etc.
2. The art or operation of measuring the velocity or discharge of running water, as in rivers, etc.
HYDROMICA
Hy `dro *mi "ca, n. Etym: [Hydro-, 1 + mica. ] (Min. )
Defn: A variety of potash mica containing water. It is less elastic than ordinary muscovite. Hydromica schist (Min. ), a mica schist characterized by the presence of hydromica. It often has a silky luster and almost soapy feel.
HYDRONEPHROSIS
Hy `dro *ne *phro "sis, n. Etym: [NL. , Gr. "y `dwr water + (Med. )
Defn: An accumulation of urine in the pelvis of the kidney, occasioned by obstruction in the urinary passages.
HYDROPATH
Hy "dro *path, n. Etym: [Cf. F. hydropathe.]
Defn: A hydropathist.
HYDROPATHIC; HYDROPATHICAL
HYDROPATHIC; HYDROPATHICAL Hy `dro *path "ic, Hy `dro *path "ic *al, a.
Defn: Of or pertaining to hydropathy.
HYDROPATHIST
HYDROPATHIST Hy *drop "a *thist, n.
Defn: One who practices hydropathy; a water-cure doctor.
HYDROPATHY
Hy *drop "a *thy, n. Etym: [Hydro-, 1 + Gr.
Defn: The water cure; a mode of treating diseases by the copious and frequent use of pure water, both internally and externally.
HYDROPERITONEUM
Hy `dro *per `i *to *ne "um, n. Etym: [NL. See Hydro-, and Peritoneum. ](Med. )
Defn: Same as Ascites.
HYDROPHANE
Hy "dro *phane, n. Etym: [Hydro-, 1 + Gr. hydrophane. ] (Min. )
Defn: A semitranslucent variety of opal that becomes translucent or transparent on immersion in water.
HYDROPHANOUS
HYDROPHANOUS Hy *droph "a *nous, a. (Min. )
Defn: Made transparent by immersion in water.
HYDROPHID
Hy "dro *phid, n. Etym: [Hydro-, 1 + Gr. (Zoöl.)
Defn: Any sea snake of the genus Hydrophys and allied genera. These snakes are venomous, live upon fishes, and have a flattened tail for swimming.
HYDROPHLORONE
Hy `dro *phlo "rone, n. Etym: [Hydro-, 2 + phlorone. ] (Chem. )
Defn: A white, crystalline benzene derivative, C8H1 O2, obtained by the reduction of phlorone.
HYDROPHOBIA
Hy `dro *pho "bi *a, n. Etym: [L., fr. Gr. "y `dwr water + hydrophobie. ](Med. ) (a ) An abnormal dread of water, said to be a symptom of canine madness; hence: (b ) The disease caused by a bite form, or inoculation with the saliva of, a rabid creature, of which the chief symptoms are, a sense of dryness and construction in the throat, causing difficulty in deglutition, and a marked heightening of reflex excitability, producing convulsions whenever the patient attempts to swallow, or is disturbed in any way, as by the sight or sound of water; rabies; canine madness. [Written also hydrophoby. ]
HYDROPHOBIC
Hy `dro *phob "ic, a. Etym: [L. hydrophobicus, Gr. hydrophobique.]
Defn: Of or pertaining to hydrophobia; producing or caused by rabies; as, hydrophobic symptoms; the hydrophobic poison.
HYDROPHOBY
HYDROPHOBY Hy "dro *pho `by, n.
Defn: See Hydrophobia.
HYDROPHORA
Hy *droph "o *ra, n. pl. Etym: [NL. , fr. E. hydra + Gr. (Zoöl.)
Defn: The Hydroidea.
HYDROPHORE
Hy "dro *phore, n. Etym: [Gr. "y `dwr water +
Defn: An instrument used for the purpose of obtaining specimens of water from any desired depth, as in a river, a lake, or the ocean.
HYDROPHYLLIUM
Hy `dro *phyl "li *um, n.; pl. L. Hydrophyllia, E. Hydrophylliums. Etym: [NL. , fr. Gr. "y `dwr water + (Zoöl.)
Defn: One of the flat, leaflike, protective zooids, covering other zooids of certain Siphonophora.
HYDROPHYTE
Hy "dro *phyte, n. Etym: [Gr. hydrophyte. ]
Defn: An aquatic plant; an alga.
HYDROPHYTOLOGY
Hy *droph `y *tol "o *gy, n. Etym: [Hydro- + phyte + -logy. ]
Defn: The branch of botany which treats of water plants.
HYDROPIC; HYDROPICAL
Hy *drop "ic, Hy *drop "ic *al, a. Etym: [L. hydropicus, Gr. hydropique.See Dropsy. ]
Defn: Dropsical, or resembling dropsy. Every lust is a kind of hydropic distemper, and the more we drink the more we shall thirst. Tillotson.
HYDROPICALLY
HYDROPICALLY Hy *drop "ic *al *ly, adv.
Defn: In a hydropical manner.
HYDROPIPER
Hy "dro *pi `per, n. Etym: [NL. , fr. Gr. "y `dwr water + L. piper a pepper. ] (Bot. )
Defn: A species (Polygonum Hydropiper ) of knotweed with acrid foliage; water pepper; smartweed.
HYDROPLANE
HYDROPLANE Hy "dro *plane, n. [Pref. hydro-, 1 + plane. ]
1. A plane, or any of a number of planes, projecting from the hull of a submarine boat, which by being elevated or depressed cause the boat, when going ahead, to sink or rise, after the manner of an aëroplane.
2. A projecting plane or fin on a gliding boat to lift the moving boat on top of the water; also, a gliding boat.
HYDROPLANE
HYDROPLANE Hy "dro *plane, v. i.
Defn: Of a boat, to plane (see Plane, below ).
HYDROPNEUMATIC
Hy `dro *pneu *mat "ic, a. Etym: [Hydro-, 1 + pneumatic: cf. F.hydropneumatique.]
Defn: Pertaining to, or depending upon, both liquid and gaseous substances; as, hydropneumatic apparatus for collecting gases over water or other liquids.
HYDROPNEUMATIC GUN CARRIAGE
HYDROPNEUMATIC GUN CARRIAGE Hy `dro *pneu *mat "ic gun carriage. (Ordnance )
Defn: A disappearing gun carriage in which the recoil is checked by cylinders containing liquid and air, the air when compressed furnishing the power for restoring the gun to the firing position. It is used with some English and European heavy guns.
HYDROPSY
HYDROPSY Hy "drop `sy, n.
Defn: Same as Dropsy.
HYDROPULT
Hy "dro *pult, n. Etym: [Hydro-, 1 + Gr.
Defn: A machine for throwing water by hand power, as a garden engine, a fire extinguisher, etc.
HYDROQUINONE
Hy `dro *qui "none, n. Etym: [Hydro-, 2 + quinone. ] (Chem. )
Defn: A white crystalline substance, C6H4 (OH )2, obtained by the reduction of quinone. It is a diacid phenol, resembling, and metameric with, pyrocatechin and resorcin. Called also dihydroxy benzene.
HYDRORHIZA
Hy `dro *rhi "za, n.; pl. L. Hydrorhizæ, E. Hydrorhizas. Etym: [NL. , fr. E. hydra + Gr. (Zoöl.)
Defn: The rootstock or decumbent stem by which a hydroid is attached to other objects. See Illust. under Hydroidea.
HYDROSALT
Hy "dro *salt `, n. Etym: [Hydro-, 1 + salt. ] (Chem. )(a ) A salt supposed to be formed by a hydracid and a base. (b ) An acid salt. [R.] (c ) A hydrous salt; a salt combined with water of hydration or crystallization.
HYDROSCOPE
Hy "dro *scope, n. Etym: [Hydro-, 1 + -scope. ]
1. An instrument designed to mark the presence of water, especially in air. Weale.
2. A kind of water clock, used anciently for measuring time, the water tricking from an orifice at the end of a graduated tube.
HYDROSOME; HYDROSOMA
Hy "dro *some, Hy `dro *so "ma, n. Etym: [NL. hydrosoma. See Hydra, and -some body. ] (Zoöl.)
Defn: All the zooids of a hydroid colony collectively, including the nutritive and reproductive zooids, and often other kinds.
HYDROSORBIC
Hy `dro *sor "bic, a. Etym: [Hydro-, 2 + sorbic. ] (Chem. )
Defn: Pertaining to, or designating, an acid obtained from sorbic acid when this takes up hydrogen; as, hydrosorbic acid.
HYDROSPHERE
HYDROSPHERE Hy "dro *sphere, n. [Pref. hydro-, 1 + sphere. ]
1. (Meteor. )
Defn: The aqueous vapor of the entire atmosphere.
2. (Phys. Geog.) The aqueous envelope of the earth, including the ocean, all lakes, streams, and underground waters, and the aqueous vapor in the atmosphere.
HYDROSTAT
HYDROSTAT Hy "dro *stat, n.
Defn: A contrivance or apparatus to prevent the explosion of steam boilers.
HYDROSTATIC; HYDROSTATICAL
Hy `dro *stat "ic, Hy `dro *stat "ic *al, a. Etym: [Hydro-, 1 + Gr. hydrostatique. See Static. ]
Defn: Of or relating to hydrostatics; pertaining to, or in accordance with, the principles of the equilibrium of fluids. The first discovery made in hydrostatics since the time of Archimedes is due to Stevinus. Hallam.Hydrostatic balance, a balance for weighing substances in water, for the purpose of ascertaining their specific gravities. -- Hydrostatic bed, a water bed. -- Hydrostatic bellows, an apparatus consisting of a water-tight bellowslike case with a long, upright tube, into which water may be poured to illustrate the hydrostatic paradox. -- Hydrostatic paradox, the proposition in hydrostatics that any quantity of water, however small, may be made to counterbalance any weight, however great; or the law of the equality of pressure of fluids in all directions. -- Hydrostatic press, a machine in which great force, with slow motion, is communicated to a large plunger by means of water forced into the cylinder in which it moves, by a forcing pump of small diameter, to which the power is applied, the principle involved being the same as in the hydrostatic bellows. Also called hydraulic press, and Bramah press. In the illustration, a is a pump with a small plunger b, which forces the water into the cylinder c, thus driving upward the large plunder d, which performs the reduced work, such as compressing cotton bales, etc.
HYDROSTATICALLY
HYDROSTATICALLY Hy `dro *stat "ic *al *ly, adv.
Defn: According to hydrostatics, or to hydrostatic principles. Bentley.
HYDROSTATICIAN
HYDROSTATICIAN Hy `dro *sta *ti "cian, n.
Defn: One who is versed or skilled in hydrostatics. [R.]
HYDROSTATICS
Hy `dro *stat "ics, n. Etym: [Cf. F. hydrostatique.] (Physics )
Defn: The branch of science which relates to the pressure and equilibrium of nonelastic fluids, as water, mercury, etc. ; the principles of statics applied to water and other liquids.
HYDROSULPHATE
HYDROSULPHATE Hy `dro *sul "phate, n. (Chem. )
Defn: Same as Hydrosulphurent.
HYDROSULPHIDE
HYDROSULPHIDE Hy `dro *sul "phide, n. (Chem. )
Defn: One of a series of compounds, derived from hydrogen sulphide by the replacement of half its hydrogen by a base or basic radical; as, potassium hydrosulphide, KSH. The hydrosulphides are analogous to the hydrates and include the mercaptans.
HYDROSULPHITE
HYDROSULPHITE Hy `dro *sul "phite, n. (Chem. )
Defn: A saline compound of hydrosulphurous acid and a base. [R.]
HYDROSULPHURET
HYDROSULPHURET Hy `dro *sul "phu *ret, n. (Chem. )
Defn: A hydrosulphide. [Archaic ]
HYDROSULPHURETED
HYDROSULPHURETED Hy `dro *sul "phu *ret `ed, a. (Chem. )
Defn: Combined with hydrogen sulphide.
HYDROSULPHURIC
Hy `dro *sul *phu "ric, a. Etym: [Hydro-, 2 + sulphuric. ] (Chem. )
Defn: Pertaining to, or derived from, hydrogen and sulphur; as, hydrosulphuricacid, a designation applied to the solution of hydrogen sulphide in water.
HYDROSULPHUROUS
HYDROSULPHUROUS Hy `dro *sul "phur *ous, a. (Chem. )
Defn: Pertaining to, or designating, an acid obtained by the reduction of sulphurous acid. See Hyposulphurous acid, under Hyposulphurous.
HYDROTELLURATE
HYDROTELLURATE Hy `dro *tel "lu *rate, n. (Chem. )
Defn: A salt formed by the union of hydrotelluric acid and the base.
HYDROTELLURIC
Hy `dro *tel *lu "ric, a. Etym: [Hydro-, 2 + telluric. ] (Chem. )
Defn: Formed by hydrogen and tellurium; as, hydrotelluric acid, or hydrogen telluride.
HYDROTHECA
Hy `dro *the "ca, n.; pl. L. Hydrothecæ, E. Hydrothecas. Etym: [NL. , fr. E. hydra + Gr. (Zoöl.)
Defn: One of the calicles which, in some Hydroidea (Thecaphora ), protect the hydrants. See Illust. of Hydroidea, and Campanularian.
HYDROTHERAPEUTICS
HYDROTHERAPEUTICS Hy `dro *ther `a *peu "tics, n. [Hydro-, 1 + therapeutics. ] (Med. )
Defn: A system of treating disease by baths and mineral waters.
HYDROTHERAPY
Hy `dro *ther "a *py, n. Etym: [Hydro-, 1 + therapy. ] (Med. )
Defn: See Hydropathy.
HYDROTHERMAL
Hy `dro *ther "mal, a. Etym: [Hydro-, 1 + thermal. ]
Defn: Of or pertaining to hot water; -- used esp. with reference to the action of heated waters in dissolving, redepositing, and otherwise producing mineral changes within the crust of the globe.
HYDROTHORAX
Hy `dro *tho "rax, n. Etym: [Hydro-, 1 + thorax. ] (Med. )
Defn: An accumulation of serous fluid in the cavity of the chest.
HYDROTIC
Hy *drot "ic, a. Etym: [Gr. "y `dwr water: cf. Gr. hydrotique.]
Defn: Causing a discharge of water or phlegm. -- n. (Med. )
Defn: A hydrotic medicine.
HYDROTICAL
HYDROTICAL Hy *drot "ic *al, a.
Defn: Hydrotic.
HYDROTROPE
Hy "dro *trope, n. Etym: [Hydro-, 1 + Gr.
Defn: A device for raising water by the direct action of steam; a pulsometer.
HYDROTROPIC
Hy `dro *trop "ic, a. Etym: [See Hydrotrope. ] (Bot. )
Defn: Turning or bending towards moisture, as roots.
HYDROTROPISM
HYDROTROPISM Hy *drot "ro *pism, n. (Bot. )
Defn: A tendency towards moisture.
HYDROUS
Hy "drous, a. Etym: [Gr. "y `dwr water. ]
1. Containing water; watery.
2. (Chem. )
Defn: Containing water of hydration or crystallization.
HYDROXANTHANE
HYDROXANTHANE Hy `dro *xan "thane, n. (Chem. )
Defn: A persulphocyanate. [Obs. ]
HYDROXANTHIC
Hy `dro *xan "thic, a. Etym: [Hydro-, 2 + xanthic. ] (Chem. )
Defn: Persulphocyanic.
HYDROXIDE
Hy *drox "ide, n. Etym: [Hydro-, 2 + oxide. ] (Chem. )
Defn: A hydrate; a substance containing hydrogen and oxygen, made by combining water with an oxide, and yielding water by elimination. The hydroxides are regarded as compounds of hydroxyl, united usually with basic element or radical; as, calcium hydroxide ethyl hydroxide.
HYDROXY-
HYDROXY- Hy *drox "y-. (Chem. )
Defn: A combining form, also used adjectively, indicating hydroxyl as an ingredient. Hydroxy acid (Chem. ), an organic acid, having (besides the hydroxyl group of the carboxyl radical ) an alcoholic hydroxyl group, and thus having the qualities of an alcohol in addition to its acid properties; as, lactic and tartaric acids are hydroxy acids.
HYDROXYL
Hy *drox "yl, n. Etym: [Hydro-, 2 + oxygen + -yl.] (Chem. )
Defn: A compound radical, or unsaturated group, HO, consisting of one atom of hydrogen and one of oxygen. It is a characteristic part of the hydrates, the alcohols, the oxygen acids, etc.
HYDROXYLAMINE
Hy *drox `yl *am "ine, n. Etym: [Hydroxyl + amine. ] (Chem. )
Defn: A nitrogenous, organic base, NH2.OH, resembling ammonia, and produced by a modified reduction of nitric acid. It is usually obtained as a volatile, unstable solution in water. It acts as a strong reducing agent.
HYDROZOA
Hy `dro *zo "a, n. pl. Etym: [NL. , fr. E. hydra + Gr. (Zoöl.)
Defn: The Acalephæ; one of the classes of coelenterates, including the Hydroidea, Discophora, and Siphonophora.
HYDROZOAL
HYDROZOAL Hy `dro *zo "al, a. (Zoöl.)
Defn: Of or pertaining to the Hydrozoa.
HYDROZOON; HYDROZOOEN
Hy `dro *zo "ön, n.; pl. L. Hydrozoa, E. Hydrozoöns. Etym: [NL. ] (Zoöl.)
Defn: One of the Hydrozoa.
New American Oxford Dictionary
hydro
hy dro |ˈhīdrō ˈhaɪdroʊ | ▶noun ( pl. hydros ) 1 a hydroelectric power plant. • hydroelectricity. • Canadian electricity. 2 Brit. a hotel or clinic originally providing hydropathic treatment. ORIGIN late 19th cent.: abbreviation.
hydro-
hydro- (also hydr- ) ▶comb. form 1 water; relating to water: hydraulic | hydrocolloid. • Medicine affected with an accumulation of serous fluid: hydrocephalus. 2 Chemistry combined with hydrogen: hydrocarbon. ORIGIN from Greek hudōr ‘water. ’
hydrobromic acid
hy dro bro mic ac id |ˌhīdrəˈbrōmik ˌhaɪdroʊˌbrɑmɪk ˈæsəd | ▶noun Chemistry a strongly acidic solution of the gas hydrogen bromide in water. [Chem. formula: HBr. ]
hydrocarbon
hy dro car bon |ˈhīdrəˌkärbən haɪdrəˈkɑːrbən | ▶noun Chemistry a compound of hydrogen and carbon, such as any of those that are the chief components of petroleum and natural gas.
hydrocele
hy dro cele |ˈhīdrəˌsēl ˈhaɪdroʊˌsil | ▶noun Medicine the accumulation of serous fluid in a body sac.
hydrocephalus
hy dro ceph a lus |ˌhīdrōˈsefələs ˌhaɪdroʊˈsɛfələs | ▶noun Medicine a condition in which fluid accumulates in the brain, typically in young children, enlarging the head and sometimes causing brain damage. DERIVATIVES hy dro ce phal ic |ˌhīdrōsəˈfalik |adjective, hy dro ceph a ly |-ˈsefəlē |noun ORIGIN late 17th cent.: modern Latin, from Greek hudrokephalon, from hudro- ‘water ’ + kephalē ‘head. ’
hydrochloric acid
hy dro chlo ric ac id |ˌhīdrəˈklôrik haɪdrəklɔːrɪkˈæsɪd | ▶noun Chemistry a strongly acidic solution of the gas hydrogen chloride in water. [Chem. formula: HCl. ]
hydrochloride
hy dro chlo ride |ˌhīdrəˈklôˌrīd ˌhaɪdroʊˈklˌraɪd | ▶noun Chemistry a compound of a particular organic base with hydrochloric acid: [ with adj. ] : cocaine hydrochloride.
hydrochlorofluorocarbon
hy dro chlo ro fluor o car bon |ˌhīdrōˌklôrōˈflo͝orōˌkärbən haɪdroʊklɔːroʊˈflʊrəkɑːrbən |(abbr.: HCFC ) ▶noun Chemistry any of a class of inert compounds of carbon, hydrogen, hydrocarbons, chlorine, and fluorine, used in place of chlorofluorocarbons as being somewhat less destructive to the ozone layer.
hydrocolloid
hy dro col loid |ˌhīdrōˈkäˌloid ˌhaɪdroʊˈkɑlɔɪd | ▶noun a substance that forms a gel in the presence of water, examples of which are used in surgical dressings and in various industrial applications.
hydrocortisone
hy dro cor ti sone |ˌhīdrəˈkôrtiˌzōn haɪdrəˈkɔːrtɪzoʊn | ▶noun Biochemistry a steroid hormone produced by the adrenal cortex and used medicinally to treat inflammation resulting from eczema and rheumatism.
hydrocyanic acid
hy dro cy an ic ac id |ˌhīdrōsīˈanik ˌhaɪdroʊˌsaɪˌænɪk ˈæsəd | ▶noun Chemistry a highly poisonous acidic solution of hydrogen cyanide in water.
hydrodynamics
hy dro dy nam ics |ˌhīdrōdīˈnamiks ˌhaɪdroʊˌdaɪˈnæmɪks | ▶plural noun [ treated as sing. ] the branch of science concerned with forces acting on or exerted by fluids (esp. liquids ). DERIVATIVES hy dro dy nam ic adjective, hy dro dy nam i cal |-ˈnamikəl |adjective, hy dro dy nam i cal ly adverb, hy dro dy nam i cist |-ˈnamisist |noun ORIGIN late 18th cent.: from modern Latin hydrodynamica, from Greek hudro- ‘water ’ + dunamikos (see dynamic ).
hydroelectric
hy dro e lec tric |ˌhīdrōəˈlektrik ˈˌhaɪdroʊəˈlɛktrɪk | ▶adjective relating to or denoting the generation of electricity using flowing water (typically from a reservoir held behind a dam or other barrier ) to drive a turbine that powers a generator. DERIVATIVES hy dro e lec tric i ty |-əlekˈtrisitē |noun
hydrofluoric acid
hy dro fluor ic ac id |ˌhīdrəˌflo͝orik ˌhaɪdroʊˌflʊərɪk ˈæsəd | ▶noun Chemistry an acidic and extremely corrosive solution of the liquid hydrogen fluoride in water. [Chem. formula: HF. ]
hydrofluorocarbon
hy dro fluor o car bon |ˌhīdrōˈflo͝orəˌkärbən haɪdroʊˈflʊroʊkɑːrbən |(abbr.: HFC ) ▶noun Chemistry any of a class of partly chlorinated and fluorinated hydrocarbons, used as an alternative to chlorofluorocarbons in foam production, refrigeration, and other processes.
hydrofoil
hy dro foil |ˈhīdrəˌfoil ˈhaɪdrəˌfɔɪl | ▶noun a boat whose hull is fitted underneath with shaped vanes (foils ) that lift the hull clear of the water to increase the boat's speed. • another term for foil 4. ORIGIN 1920s: from hydro- ‘relating to water ’ + foil 4 .
hydrofracturing
hy dro frac tur ing |ˈhīdrəˌfrakCHəriNG ˈhaɪdrəˌfræk (t )ʃərɪŋ | ▶noun another term for hydraulic fracturing.
hydrogel
hy dro gel |ˈhīdrəˌjel ˈhaɪdrəʤɛl | ▶noun a gel in which the liquid component is water.
hydrogen
hy dro gen |ˈhīdrəjən ˈhaɪdrəʤən | ▶noun a colorless, odorless, highly flammable gas, the chemical element of atomic number 1. (Symbol: H ) Hydrogen is the lightest of the chemical elements and has the simplest atomic structure, a single electron orbiting a nucleus consisting of a single proton. It is by far the most common element in the universe, although not on the earth, where it occurs chiefly combined with oxygen as water. DERIVATIVES hy drog e nous |hīˈdräjənəs |adjective ORIGIN late 18th cent.: coined in French from Greek hudro- ‘water ’ + -genēs (see -gen ).
hydrogenase
hy drog e nase |ˈhīdrəjəˌnās, hīˈdräjə -ˈhaɪdrəʤəneɪs | ▶noun [ usu. with modifier ] Biochemistry an enzyme that catalyzes the reduction of a particular substance by hydrogen.
hydrogenate
hy dro gen ate |ˈhīdrəjəˌnāt, hīˈdräjənāt ˈhaɪdrəʤəneɪt | ▶verb [ with obj. ] (often as adj. hydrogenated ) charge with or cause to combine with hydrogen. DERIVATIVES hy dro gen a tion |ˌhīdrəjəˈnāSHən, hīˌdräjə - |noun
hydrogen bomb
hy dro gen bomb |ˈhaɪdrəʤən bɑm | ▶noun an immensely powerful bomb whose destructive power comes from the rapid release of energy during the nuclear fusion of isotopes of hydrogen (deuterium and tritium ), using an atom bomb as a trigger. Compare with atom bomb.
hydrogen bond
hy dro gen bond ▶noun Chemistry a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
hydrogen cyanide
hy dro gen cy a nide ▶noun Chemistry a highly poisonous gas or volatile liquid with an odor of bitter almonds, made by the action of acids on cyanides. [Chem. formula: HCN. ]
hydrogen peroxide
hy dro gen per ox ide |ˈhaɪdrəʤən pəˈrɑkˌsaɪd | ▶noun Chemistry a colorless, viscous, unstable liquid with strong oxidizing properties, commonly used in diluted form in disinfectants and bleaches. [Chem. formula: H 2 O 2. ]
hydrogen sulfide
hy dro gen sul fide ▶noun Chemistry a colorless poisonous gas with a smell of rotten eggs, made by the action of acids on sulfides. [Chem. formula: H 2 S. ]
hydrogeology
hy dro ge ol o gy |ˌhīdrəjēˈäləjē ˌhaɪdrəʤiˈɑləʤi | ▶noun the branch of geology concerned with water occurring underground or on the surface of the earth. DERIVATIVES hy dro ge o log i cal |-ˌjēəˈläjikəl |adjective, hy dro ge ol o gist |-jist |noun
hydrography
hy drog ra phy |hīˈdrägrəfē haɪˈdrɑɡrəfi | ▶noun the science of surveying and charting bodies of water, such as seas, lakes, and rivers. DERIVATIVES hy drog ra pher |-fər |noun, hy dro graph ic |ˌhīdrəˈgrafik |adjective, hy dro graph i cal |ˌhīdrəˈgrafikəl |adjective, hy dro graph i cal ly |ˌhīdrəˈgrafik (ə )lē |adverb
hydroid
hy droid |ˈhīˌdroid ˈhaɪdrɔɪd |Zoology ▶noun a coelenterate of an order that includes the hydras. They are distinguished by the dominance of the polyp phase. [Order Hydroida, class Hydrozoa. ] ▶adjective of or relating to coelenterates of this group. • another term for polypoid ( sense 1 ). ORIGIN mid 19th cent.: from hydra + -oid .
hydrolase
hy dro lase |ˈhīdrəˌlās, -ˌlāz ˈhaɪdərəleɪs | ▶noun [ usu. with modifier ] Biochemistry an enzyme that catalyzes the hydrolysis of a particular substrate.
hydrology
hy drol o gy |hīˈdräləjē haɪˈdrɑləʤi | ▶noun the branch of science concerned with the properties of the earth's water, esp. its movement in relation to land. DERIVATIVES hy dro log ic |ˌhīdrəˈläjik |adjective, hy dro log i cal |ˌhīdrəˈläjikəl |adjective, hy dro log i cal ly |ˌhīdrəˈläjik (ə )lē |adverb, hy drol o gist |-jist |noun
hydrolysate
hy drol y sate |hīˈdräləˌsāt haɪˈdrɑləseɪt | ▶noun Chemistry a substance produced by hydrolysis.
hydrolysis
hy drol y sis |hīˈdräləsis haɪˈdrɑləsəs | ▶noun Chemistry the chemical breakdown of a compound due to reaction with water. DERIVATIVES hy dro lyt ic |ˌhīdrəˈlitik |adjective
hydrolyze
hy dro lyze |ˈhīdrəˌlīz ˈhaɪdrəlaɪz |(Brit. hydrolyse ) ▶verb [ with obj. ] Chemistry break down (a compound ) by chemical reaction with water. • [ no obj. ] undergo this process.
hydromagnetics
hy dro mag net ics |ˌhīdrōmagˈnetiks ˌhaɪdrəmæɡˈnɛdɪks | ▶plural noun another term for magnetohydrodynamics. DERIVATIVES hy dro mag net ic adjective
hydromancy
hy dro man cy |ˈhīdrəˌmansē ˈhaɪdrəmænsi | ▶noun divination by means of signs derived from the appearance of water and its movements.
hydromassage
hy dro mas sage |ˌhīdrōməˈsäZH, -ˈsäj ˌhaɪdroʊməˈsɑʒ | ▶noun massage using jets of water, as a health or beauty treatment.
hydromechanics
hy dro me chan ics |ˌhīdrōməˈkaniks ˌhaɪdrəməˈkænɪks | ▶plural noun [ treated as sing. ] the mechanics of liquids; hydrodynamics, esp. in relation to mechanical applications. DERIVATIVES hy dro me chan i cal |-ˈkanikəl |adjective
hydromedusa
hy dro me du sa |ˌhīdrōməˈd (y )o͞osə, -zə ˌhaɪdroʊməˈdjusə | ▶noun ( pl. hydromedusae |-ˌsē, -ˌzē | ) Zoology the medusoid phase of a hydroid coelenterate.
hydromel
hy dro mel |ˈhīdrəˌmel ˈhaɪdrəmɛl | ▶noun historical a drink similar to mead, made with fermented honey and water. ORIGIN late Middle English: from Latin, from Greek hudromeli, from hudro- ‘water ’ + meli ‘honey. ’
hydrometeor
hy dro me te or |ˌhīdrōˈmētēər ˌhaɪdroʊˈmidiər | ▶noun Meteorology an atmospheric phenomenon or entity involving water or water vapor, such as rain or a cloud.
hydrometer
hy drom e ter |hīˈdrämitər haɪˈdrɑmədər | ▶noun an instrument for measuring the density of liquids. DERIVATIVES hy dro met ric |ˌhīdrəˈmetrik |adjective, hy drom e try |-itrē |noun
hydronic
hy dron ic |hīˈdränik haɪˈdrɑnɪk | ▶adjective denoting a cooling or heating system in which heat is transported using circulating water.
hydronium ion
hy dro ni um i on |hīˈdrōnēəm haɪˈdroʊniəm ˌaɪən | ▶noun Chemistry the ion H 3 O +, consisting of a protonated water molecule and present in all aqueous acids. ORIGIN early 20th cent.: hydronium, from German (a contraction ).
hydropathy
hy drop a thy |hīˈdräpəTHē haɪˈdrɑpəθi | ▶noun the treatment of illness through the use of water, either internally or through external means such as steam baths (not now a part of orthodox medicine ). Compare with hydrotherapy. DERIVATIVES hy dro path ic |ˌhīdrəˈpaTHik |adjective, hy drop a thist |-THist |noun ORIGIN mid 19th cent.: from hydro- ‘of water, ’ on the pattern of allopathy and homeopathy .
hydrophilic
hy dro phil ic |ˌhīdrəˈfilik ˌhaɪdrəˈfɪlɪk | ▶adjective having a tendency to mix with, dissolve in, or be wetted by water. The opposite of hydrophobic. DERIVATIVES hy dro phi lic i ty |-fəˈlisitē |noun
hydrophilous
hy droph i lous |hīˈdräfələs haɪˈdrɑfələs | ▶adjective Botany (of a plant ) water-pollinated. DERIVATIVES hy droph i ly |-ˈdräfəlē |noun
hydrophobia
hy dro pho bi a |ˌhīdrəˈfōbēə ˈˌhaɪdrəˈˌfoʊbiə | ▶noun extreme or irrational fear of water, esp. as a symptom of rabies in humans. • rabies, esp. in humans. ORIGIN late Middle English: via late Latin from Greek hudrophobia, from hudro- ‘water ’ + phobos ‘fear. ’
hydrophobic
hy dro pho bic |ˌhīdrəˈfōbik ˈˌhaɪdrəˈˌfoʊbɪk | ▶adjective 1 tending to repel or fail to mix with water. The opposite of hydrophilic. 2 of or suffering from hydrophobia. DERIVATIVES hy dro pho bic i ty |-fōˈbisitē |noun
hydrophone
hy dro phone |ˈhīdrəˌfōn ˈhaɪdrəfoʊn | ▶noun a microphone that detects sound waves under water.
hydrophyte
hy dro phyte |ˈhīdrəˌfīt ˈhaɪdrəfaɪt | ▶noun Botany a plant that grows only in or on water. DERIVATIVES hy dro phyt ic |ˌhīdrəˈfitik |adjective
hydroplane
hy dro plane |ˈhīdrəˌplān ˈhaɪdrəˌpleɪn | ▶noun 1 a light fast motorboat designed to skim over the surface of water. 2 a finlike attachment that enables a moving submarine to rise or fall in the water. 3 a seaplane. ▶verb [ no obj. ] (of a vehicle ) slide uncontrollably on the wet surface of a road: a motorist whose car hydroplaned and crashed into a tree.
hydroponics
hy dro pon ics |ˌhīdrəˈpäniks ˈˌhaɪdrəˈˌpɑnɪks | ▶plural noun [ treated as sing. ] the process of growing plants in sand, gravel, or liquid, with added nutrients but without soil. DERIVATIVES hy dro pon ic adjective, hy dro pon i cal ly |-ˈpänik (ə )lē |adverb ORIGIN 1930s: from hydro- ‘of water ’ + Greek ponos ‘labor ’ + -ics .
hydropower
hy dro pow er |ˈhīdrəˌpouər ˈhaɪdrəpaʊər | ▶noun hydroelectric power.
hydroquinone
hy dro qui none |ˌhīdrōkwiˈnōn, -ˈkwinˌōn ˌhaɪdrəˈkwɪˌnoʊn | ▶noun Chemistry a crystalline compound made by the reduction of benzoquinone. [Alternative name: benzene-1,4-diol; chem. formula: C 6 H 4 (OH ) 2. ]
hydrospeed
hydrospeed |ˈhʌɪdrə (ʊ )spiːd |(also hydrospeeding ) ▶noun [ mass noun ] a sport or leisure activity that involves jumping into fast-flowing white water and being carried along at high speed while buoyed up by a float.
hydrosphere
hy dro sphere |ˈhīdrəˌsfir ˈhaɪdroʊsfɪr | ▶noun (usu. the hydrosphere ) all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.
hydrostatic
hy dro stat ic |ˌhīdrəˈstatik ˌhaɪdrəˈstædɪk | ▶adjective relating to or denoting the equilibrium of liquids and the pressure exerted by liquid at rest. DERIVATIVES hy dro stat i cal adjective, hy dro stat i cal ly |ik (ə )lē |adverb ORIGIN late 17th cent.: probably from Greek hudrostatēs ‘hydrostatic balance, ’ from hudro- ‘water ’ + statikos (see static ).
hydrostatics
hy dro stat ics |ˌhīdrəˈstatiks ˌhaɪdrəˈstædɪks | ▶plural noun [ treated as sing. ] the branch of mechanics concerned with the hydrostatic properties of liquids.
hydrosulfite
hy dro sul fite |ˌhīdrōˈsəlˌfīt ˌhaɪdroʊˈsəlfaɪt | ▶noun another term for dithionite.
hydrotherapy
hy dro ther a py |ˌhīdrəˈTHerəpē ˈˌhaɪdroʊˈθɛrəpi | ▶noun another term for hydropathy. • the use of exercises in a pool as part of treatment for conditions such as arthritis or partial paralysis. DERIVATIVES hy dro ther a pist |-pist |noun
hydrothermal
hy dro ther mal |ˌhīdrəˈTHərməl ˌhaɪdroʊˈθərməl | ▶adjective of, relating to, or denoting the action of heated water in the earth's crust. DERIVATIVES hy dro ther mal ly adverb
hydrothermal vent
hy dro ther mal vent ▶noun an opening in the sea floor out of which heated mineral-rich water flows.
hydrothorax
hy dro tho rax |ˌhīdrəˈTHôˌraks ˌhaɪdroʊˈθɔræks | ▶noun the condition of having fluid in the pleural cavity.
hydrotropism
hy drot ro pism |ˌhīˈdrätrəˌpizəm ˌhaɪdroʊˈtrɑpɪzəm | ▶noun Botany the growth or turning of plant roots toward or away from moisture.
hydrous
hy drous |ˈhīdrəs ˈhaɪdrəs | ▶adjective chiefly Chemistry & Geology containing water as a constituent: a hydrous lava flow. ORIGIN early 19th cent.: from Greek hudro- ‘water ’ + -ous .
hydroxide
hy drox ide |hīˈdräkˌsīd haɪˈdrɑkˌsaɪd | ▶noun Chemistry a compound of a metal with the hydroxide ion OH − (as in many alkalis ) or the group −OH.
hydroxonium ion
hy drox o ni um i on |ˌhīdräkˈsōnēəm ˌhaɪdrɑkˌsoʊniəm ˈaɪən | ▶noun Chemistry another term for hydronium ion. ORIGIN 1920s: hydroxonium from hydro- (relating to hydrogen ) + oxy- 2 + the suffix -onium (from ammonium ).
hydroxy-
hydroxy- ▶comb. form Chemistry representing hydroxyl or hydroxide: hydroxyapatite.
hydroxyapatite
hy drox y a pa tite |hīˌdräksēˈapəˌtīt ˌhaɪdrɑksiˈæpətaɪt | ▶noun a mineral of the apatite group that is the main inorganic constituent of tooth enamel and bone, although it is rare in rocks.
hydroxyl
hy drox yl |hīˈdräksəl haɪˈdrɑksəl | ▶noun [ as modifier ] Chemistry of or denoting the radical −OH, present in alcohols and many other organic compounds: a hydroxyl group. ORIGIN mid 19th cent.: from a blend of hydrogen and oxygen, + -yl .
hydroxylate
hy drox yl ate |hīdräksəˌlāt haɪˈdrɑksəleɪt | ▶verb [ with obj. ] (often as adj. hydroxylated ) Chemistry introduce a hydroxyl group into (a molecule or compound ). DERIVATIVES hy drox y la tion |hiˌdräksəˈlāSHən |noun
Hydrozoa
Hy dro zo a |ˌhīdrəˈzōə ˌhaɪdrəˈzoʊə |Zoology a class of coelenterates that includes hydras and Portuguese men-of-war. Many of them are colonial, and some kinds have both polypoid and medusoid phases. ORIGIN modern Latin (plural ), from hydro- ‘water ’ + Greek zōion ‘animal. ’
hydrozoan
hy dro zo an |ˌhīdrəˈzōən ˌhaɪdrəˈzoʊən |Zoology ▶noun a coelenterate of the class Hydrozoa, such as a hydra or Portuguese man-of-war. ▶adjective relating to or denoting hydrozoans.
Oxford Dictionary
hydro
hydro |ˈhʌɪdrəʊ | ▶noun ( pl. hydros ) 1 Brit. a hotel or clinic originally providing hydropathic treatment. 2 a hydroelectric power plant. • [ mass noun ] hydroelectricity. • [ mass noun ] Canadian electricity. ORIGIN late 19th cent.: abbreviation.
hydro-
hydro- |ˈhʌɪdrəʊ |(also hydr- ) ▶combining form 1 water; relating to water: hydraulic | hydrocolloid. • Medicine affected with an accumulation of serous fluid: hydrocephalus. 2 Chemistry combined with hydrogen: hydrocarbon. ORIGIN from Greek hudōr ‘water ’.
hydrobromic acid
hydrobromic acid |ˌhʌɪdrə (ʊ )ˈbrəʊmɪk | ▶noun [ mass noun ] Chemistry a strongly acidic solution of the gas hydrogen bromide in water. ●Chem. formula: HBr.
hydrocarbon
hydro |car ¦bon |ˌhʌɪdrə (ʊ )ˈkɑːb (ə )n | ▶noun Chemistry a compound of hydrogen and carbon, such as any of those which are the chief components of petroleum and natural gas.
hydrocele
hydrocele |ˈhʌɪdrə (ʊ )siːl | ▶noun [ mass noun ] Medicine the accumulation of serous fluid in a body sac.
hydrocephalus
hydrocephalus |ˌhʌɪdrəˈsɛf (ə )ləs, -ˈkɛf -| ▶noun [ mass noun ] Medicine a condition in which fluid accumulates in the brain, typically in young children, enlarging the head and sometimes causing brain damage. DERIVATIVES hydrocephalic |-sɪˈfalɪk, -kɪˈfalɪk |adjective, hydrocephaly noun ORIGIN late 17th cent.: modern Latin, from Greek hudrokephalon, from hudro- ‘water ’ + kephalē ‘head ’.
hydrochloric acid
hydro |chlor ¦ic acid |ˌhʌɪdrəˈklɔːrɪk, -ˈklɒrɪk | ▶noun [ mass noun ] Chemistry a strongly acidic solution of the gas hydrogen chloride in water. ●Chem. formula: HCl.
hydrochloride
hydro |chlor ¦ide |ˌhʌɪdrə (ʊ )ˈklɔːrʌɪd | ▶noun Chemistry a compound of a particular organic base with hydrochloric acid: [ with modifier ] : cocaine hydrochloride.
hydrochlorofluorocarbon
hydrochlorofluorocarbon |ˌhʌɪdrəˌklɔːrə (ʊ )ˈflʊərə (ʊ )kɑːbən, -ˌflɔːrə (ʊ )- |(abbrev.: HCFC ) ▶noun Chemistry any of a class of inert compounds of carbon, hydrogen, chlorine, and fluorine, used in place of CFCs as being somewhat less destructive to the ozone layer.
hydrocolloid
hydrocolloid |ˌhʌɪdrə (ʊ )ˈkɒlɔɪd | ▶noun a substance which forms a gel in the presence of water, examples of which are used in surgical dressings and in various industrial applications.
hydrocortisone
hydro |cor ¦ti ¦sone |ˌhʌɪdrə (ʊ )ˈkɔːtɪzəʊn | ▶noun [ mass noun ] Biochemistry a steroid hormone produced by the adrenal cortex and used medicinally to treat inflammation resulting from eczema and rheumatism.
hydroculture
hydro |cul ¦ture ▶noun another term for hydroponics.
hydrocyanic acid
hydrocyanic acid |ˌhʌɪdrə (ʊ )sʌɪˈanɪk | ▶noun [ mass noun ] Chemistry a highly poisonous acidic solution of hydrogen cyanide in water.
hydrodynamics
hydro |dynam ¦ics |ˌhʌɪdrə (ʊ )dʌɪˈnamɪks | ▶plural noun [ treated as sing. ] the branch of science concerned with forces acting on or exerted by fluids (especially liquids ). DERIVATIVES hydrodynamic adjective, hydrodynamical adjective, hydrodynamicist |-sɪst |noun ORIGIN late 18th cent.: from modern Latin hydrodynamica, from Greek hudro- ‘water ’ + dunamikos (see dynamic ).
hydroelectric
hydro |elec ¦tric |hʌɪdrəʊɪˈlɛktrɪk | ▶adjective relating to or denoting the generation of electricity using flowing water (typically from a reservoir held behind a dam or barrage ) to drive a turbine which powers a generator. DERIVATIVES hydroelectricity |-ˈtrɪsɪti |noun
hydrofluoric acid
hydrofluoric acid |ˌhʌɪdrə (ʊ )ˈflʊərɪk | ▶noun [ mass noun ] Chemistry an acidic, extremely corrosive solution of the liquid hydrogen fluoride in water. ●Chem. formula: HF.
hydrofluorocarbon
hydrofluorocarbon |ˌhʌɪdrə (ʊ )ˈflʊərə (ʊ )ˌkɑːb (ə )n, -ˈflɔː - |(abbrev.: HFC ) ▶noun Chemistry any of a class of partly chlorinated and fluorinated hydrocarbons, used as an alternative to CFCs in foam production, refrigeration, and other processes.
hydrofoil
hydro |foil |ˈhʌɪdrə (ʊ )fɔɪl | ▶noun a boat whose hull is fitted underneath with shaped vanes (foils ) which lift the hull clear of the water at speed. • each of the foils of a hydrofoil. ORIGIN 1920s: from hydro- ‘relating to water ’, on the pattern of aerofoil .
hydrofracturing
hydro |frac ¦tur ¦ing |ˈhʌɪdrəʊˌfraktʃərɪŋ | ▶noun another term for hydraulic fracturing.
hydrogel
hydro |gel |ˈhʌɪdrə (ʊ )dʒɛl | ▶noun a gel in which the liquid component is water.
hydrogen
hydrogen |ˈhʌɪdrədʒ (ə )n | ▶noun [ mass noun ] a colourless, odourless, highly flammable gas, the chemical element of atomic number 1. (Symbol: H ) Hydrogen is the lightest of the chemical elements and has the simplest atomic structure, a single electron orbiting a nucleus consisting of a single proton. It is by far the commonest element in the universe, although not on the earth, where it occurs chiefly combined with oxygen as water. DERIVATIVES hydrogenous |-ˈdrɒdʒɪnəs |adjective ORIGIN late 18th cent.: coined in French from Greek hudro- ‘water ’ + -genēs (see -gen ).
hydrogenase
hydrogenase |hʌɪˈdrɒdʒəneɪz | ▶noun [ usu. with modifier ] Biochemistry an enzyme which catalyses the reduction of a particular substance by hydrogen.
hydrogenate
hydrogenate |hʌɪˈdrɒdʒəneɪt, ˈhʌɪdrədʒəneɪt | ▶verb [ with obj. ] (often as adj. hydrogenated ) charge with or cause to combine with hydrogen. DERIVATIVES hydrogenation |-ˈneɪʃ (ə )n |noun
hydrogen bomb
hydro |gen bomb ▶noun an immensely powerful bomb whose destructive power comes from the rapid release of energy during the nuclear fusion of isotopes of hydrogen (deuterium and tritium ), using an atom bomb as a trigger.
hydrogen bond
hydro |gen bond ▶noun Chemistry a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
hydrogen cyanide
hydro |gen cyan |ide ▶noun [ mass noun ] Chemistry a highly poisonous gas or volatile liquid with an odour of bitter almonds, made by the action of acids on cyanides. ●Chem. formula: HCN.
hydrogen peroxide
hydro |gen per |ox ¦ide ▶noun [ mass noun ] Chemistry a colourless viscous unstable liquid with strong oxidizing properties, used in some disinfectants and bleaches. ●Chem. formula: H 2 O 2.
hydrogen sulphide
hydro |gen sul |phide ▶noun [ mass noun ] Chemistry a colourless poisonous gas with a smell of bad eggs, made by the action of acids on sulphides. ●Chem. formula: H 2 S.
hydrogeology
hydro |geol ¦ogy |ˌhʌɪdrəʊdʒɪˈɒlədʒi | ▶noun [ mass noun ] the branch of geology concerned with water occurring underground or on the surface of the earth. DERIVATIVES hydrogeological |-dʒɪəˈlɒdʒɪk (ə )l |adjective, hydrogeologist noun
hydrography
hydrography |hʌɪˈdrɒgrəfi | ▶noun [ mass noun ] the science of surveying and charting bodies of water, such as seas, lakes, and rivers. DERIVATIVES hydrographer noun, hydrographic |hʌɪdrəˈgrafɪk |adjective, hydrographical |hʌɪdrəˈgrafɪk (ə )l |adjective, hydrographically |hʌɪdrəˈgrafɪk (ə )li |adverb
hydroid
hydroid |ˈhʌɪdrɔɪd |Zoology ▶noun a coelenterate of an order which includes the hydras. They are distinguished by the dominance of the polyp phase. ●Order Hydroida, class Hydrozoa. ▶adjective relating to coelenterates of the hydroid group. • another term for polypoid ( sense 1 ). ORIGIN mid 19th cent.: from hydra + -oid .
hydrolase
hydrolase |ˈhʌɪdrəleɪz | ▶noun [ usu. with modifier ] Biochemistry an enzyme that catalyses the hydrolysis of a particular substrate.
hydrology
hy ¦drol |ogy |hʌɪˈdrɒlədʒi | ▶noun [ mass noun ] the branch of science concerned with the properties of the earth's water, and especially its movement in relation to land. DERIVATIVES hydrologic |hʌɪdrəˈlɒdʒɪk |adjective, hydrological |hʌɪdrəˈlɒdʒɪk (ə )l |adjective, hydrologically |hʌɪdrəˈlɒdʒɪk (ə )li |adverb, hydrologist noun
hydrolysate
hydrolysate |hʌɪˈdrɒlɪseɪt | ▶noun Chemistry a substance produced by hydrolysis.
hydrolyse
hydrolyse |ˈhʌɪdrəlʌɪz |(US hydrolyze ) ▶verb [ with obj. ] Chemistry break down (a compound ) by chemical reaction with water. • [ no obj. ] undergo hydrolysis.
hydrolysis
hydrolysis |hʌɪˈdrɒlɪsɪs | ▶noun [ mass noun ] Chemistry the chemical breakdown of a compound due to reaction with water. DERIVATIVES hydrolytic |ˌhʌɪdrəˈlɪtɪk |adjective
hydromagnetics
hydro |mag ¦net ¦ics |ˌhʌɪdrə (ʊ )magˈnɛtɪk | ▶plural noun another term for magnetohydrodynamics. DERIVATIVES hydromagnetic adjective
hydromancy
hy dro man cy |ˈhīdrəˌmansē ˈhaɪdrəmænsi | ▶noun divination by means of signs derived from the appearance of water and its movements.
hydromassage
hydro |mas ¦sage ▶noun [ mass noun ] massage using jets of water, as a health or beauty treatment.
hydromechanics
hydro |mech ¦an ¦ics |hʌɪdrə (ʊ )mɪˈkanɪks | ▶plural noun [ treated as sing. ] the mechanics of liquids; hydrodynamics, especially in relation to mechanical applications. DERIVATIVES hydromechanical adjective
hydromedusa
hydromedusa |ˌhʌɪdrəʊmɪˈdjʊːzə | ▶noun ( pl. hydromedusae ) Zoology the medusoid phase of a hydroid coelenterate.
hydromel
hydromel |ˈhʌɪdrəmɛl | ▶noun [ mass noun ] historical a drink similar to mead, made with fermented honey and water. ORIGIN late Middle English: from Latin, from Greek hudromeli, from hudro- ‘water ’ + meli ‘honey ’.
hydrometeor
hydro |meteor ▶noun Meteorology an atmospheric phenomenon or entity involving water or water vapour, such as rain or a cloud.
hydrometer
hydrometer |hʌɪˈdrɒmɪtə | ▶noun an instrument for measuring the density of liquids. DERIVATIVES hydrometric |hʌɪdrəˈmɛtrɪk |adjective, hydrometry noun
hydronic
hydronic |hʌɪˈdrɒnɪk | ▶adjective denoting a cooling or heating system in which heat is transported using circulating water.
hydronium ion
hydronium ion |hʌɪˈdrəʊnɪəm | ▶noun Chemistry another term for hydroxonium ion. ORIGIN early 20th cent.: hydronium, from German (a contraction ).
hydropathy
hydropathy |hʌɪˈdrɒpəθi | ▶noun [ mass noun ] the treatment of illness through the use of water, either internally or through external means such as steam baths (not now a part of orthodox medicine ). Compare with hydrotherapy. DERIVATIVES hydropathic |hʌɪdrəˈpaθɪk |adjective, hydropathist noun ORIGIN mid 19th cent.: from hydro- ‘of water ’, on the pattern of allopathy and homeopathy .
hydrophilic
hydrophilic |ˌhʌɪdrə (ʊ )ˈfɪlɪk | ▶adjective having a tendency to mix with, dissolve in, or be wetted by water. The opposite of hydrophobic. DERIVATIVES hydrophilicity noun
hydrophilous
hydrophilous |hʌɪˈdrɒfɪl (ə )s | ▶adjective Botany (of a plant ) water-pollinated. DERIVATIVES hydrophily noun
hydrophobia
hydrophobia |ˌhʌɪdrə (ʊ )ˈfəʊbɪə | ▶noun [ mass noun ] extreme or irrational fear of water, especially as a symptom of rabies in humans. • rabies, especially in humans. ORIGIN late Middle English: via late Latin from Greek hudrophobia, from hudro- ‘water ’ + phobos ‘fear ’.
hydrophobic
hydro |pho ¦bic |hʌɪdrə (ʊ )ˈfəʊbɪk | ▶adjective 1 tending to repel or fail to mix with water. The opposite of hydrophilic. 2 of or suffering from hydrophobia. DERIVATIVES hydrophobicity noun
hydrophone
hydro |phone |ˈhʌɪdrəfəʊn | ▶noun a microphone which detects sound waves under water.
hydrophyte
hydro |phyte |ˈhʌɪdrəfʌɪt | ▶noun Botany a plant which grows only in or on water. DERIVATIVES hydrophytic adjective
hydroplane
hydro |plane |ˈhʌɪdrəpleɪn | ▶noun 1 a light, fast motor boat designed to skim over the surface of water. 2 a fin-like attachment which enables a moving submarine to rise or fall in the water. 3 US a seaplane. ▶verb N. Amer. another term for aquaplane.
hydroponics
hydroponics |ˌhʌɪdrə (ʊ )ˈpɒnɪks | ▶plural noun [ treated as sing. ] the process of growing plants in sand, gravel, or liquid, with added nutrients but without soil. DERIVATIVES hydroponic adjective, hydroponically adverb ORIGIN 1930s: from hydro- ‘of water ’ + Greek ponos ‘labour ’ + -ics .
hydropower
hydro |power |ˈhʌɪdrə (ʊ )paʊə | ▶noun [ mass noun ] hydroelectric power.
hydroquinone
hydroquinone |ˌhʌɪdrəˈkwɪnəʊn | ▶noun [ mass noun ] Chemistry a crystalline compound made by the reduction of benzoquinone. ●Alternative name: benzene-1,4-diol; chem. formula: C 6 H 4 (OH ) 2.
hydrospeed
hydrospeed |ˈhʌɪdrə (ʊ )spiːd |(also hydrospeeding ) ▶noun [ mass noun ] a sport or leisure activity that involves jumping into fast-flowing white water and being carried along at high speed while buoyed up by a float.
hydrosphere
hydro |sphere |ˈhʌɪdrəsfɪə | ▶noun (usu. the hydrosphere ) all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.
hydrostatic
hydro |stat ¦ic |ˌhʌɪdrə (ʊ )ˈstatɪk | ▶adjective relating to or denoting the equilibrium of liquids and the pressure exerted by liquid at rest. DERIVATIVES hydrostatical adjective, hydrostatically adverb ORIGIN late 17th cent.: probably from Greek hudrostatēs ‘hydrostatic balance ’, from hudro- ‘water ’ + statikos (see static ).
hydrostatics
hydro |stat ¦ics |hʌɪdrə (ʊ )ˈstatɪks | ▶plural noun [ treated as sing. ] the branch of mechanics concerned with the hydrostatic properties of liquids.
hydrosulphite
hydrosulphite |ˌhʌɪdrə (ʊ )ˈsʌlfʌɪt | ▶noun another term for dithionite.
hydrotherapy
hydro |ther ¦apy |hʌɪdrə (ʊ )ˈθɛrəpi | ▶noun 1 [ mass noun ] the use of exercises in a pool as part of treatment for conditions such as arthritis. 2 another term for hydropathy. DERIVATIVES hydrotherapist noun
hydrothermal
hydro |ther ¦mal |hʌɪdrə (ʊ )ˈθəːm (ə )l | ▶adjective relating to or denoting the action of heated water in the earth's crust. DERIVATIVES hydrothermally adverb
hydrothermal vent
hydro |ther ¦mal vent ▶noun an opening in the sea floor out of which heated mineral-rich water flows.
hydrothorax
hydro |thorax |ˌhʌɪdrə (ʊ )ˈθɔːraks | ▶noun [ mass noun ] the condition of having fluid in the pleural cavity.
hydrotropism
hydrotropism |hʌɪˈdrɒtrəpɪz (ə )m | ▶noun [ mass noun ] Botany the growth or turning of plant roots towards or away from moisture.
hydrous
hy |drous |ˈhʌɪdrəs | ▶adjective chiefly Chemistry & Geology containing water as a constituent: a hydrous lava flow. ORIGIN early 19th cent.: from Greek hudro- ‘water ’ + -ous .
hydroxide
hy ¦drox |ide |hʌɪˈdrɒksʌɪd | ▶noun Chemistry a compound of a metal with the hydroxide ion OH − (as in many alkalis ) or the group −OH.
hydroxonium ion
hydroxonium ion |ˌhʌɪdrɒkˈsəʊnɪəm | ▶noun Chemistry the ion H 3 O +, consisting of a protonated water molecule and present in all aqueous acids. ORIGIN 1920s: hydroxonium from hydro- (relating to hydrogen ) + oxy- 2 + the suffix -onium (from ammonium ).
hydroxy-
hydroxy- |hʌɪˈdrɒksi | ▶combining form Chemistry representing hydroxyl or hydroxide: hydroxyapatite.
hydroxyapatite
hydroxyapatite |ˌhʌɪdrɒksɪˈapətʌɪt | ▶noun [ mass noun ] a mineral related to apatite which is the main inorganic constituent of tooth enamel and bone, although it is rare in rocks.
hydroxyl
hydroxyl |hʌɪˈdrɒksɪl, -sɪl | ▶noun [ as modifier ] Chemistry of or denoting the radical −OH, present in alcohols and many other organic compounds: a hydroxyl group. ORIGIN mid 19th cent.: from a blend of hydrogen and oxygen, + -yl .
hydroxylate
hydroxylate |hʌɪˈdrɒksɪleɪt | ▶verb [ with obj. ] (often as adj. hydroxylated ) Chemistry introduce a hydroxyl group into (a molecule or compound ). DERIVATIVES hydroxylation noun
Hydrozoa
Hydrozoa |ˌhʌɪdrə (ʊ )ˈzəʊə | ▶plural noun Zoology a class of coelenterates which includes hydras and Portuguese men-of-war. Many of them are colonial and some kinds have both polypoid and medusoid phases. ORIGIN modern Latin (plural ), from hydro- ‘water ’ + Greek zōion ‘animal ’.
hydrozoan
hydrozoan |ˌhʌɪdrəˈzəʊən |Zoology ▶noun a coelenterate of the class Hydrozoa, such as a hydra or Portuguese man-of-war. ▶adjective relating to or denoting hydrozoans.
Duden Dictionary
hydro-
hy d ro-, Hy d ro-, hy d r-, Hy d r-, hy dro- Hy dro- hy dr- Hy dr- Präfix Hydro- vor Vokalen auch hydr- Hydr- zu griechisch hýdor = Wasser Bestimmungswort in Zusammensetzungen mit der Bedeutung Wasser z. B. hydrodynamisch, Hydrämie, Hydrometer
Hydrobienschicht
Hy d ro bi en schicht , Hy dro bi en schicht Substantiv, feminin , die |Hydr o bienschicht |die Hydrobienschicht; Genitiv: der Hydrobienschicht, Plural: die Hydrobienschichten meist im Plural griechisch ; deutsch im Tertiär entstandener versteinerungsreicher, bituminöser Mergelschiefer im Oberrheingebiet
Hydrobiologe
Hy d ro bio lo ge , Hy dro bio lo ge Substantiv, maskulin , der |Hydrobiol o ge |der Hydrobiologe; Genitiv: des Hydrobiologen, Plural: die Hydrobiologen Wissenschaftler auf dem Gebiet der Hydrobiologie
Hydrobiologie
Hy d ro bio lo gie , Hy dro bio lo gie Substantiv, feminin , die |Hydrobiolog ie |(als Teilgebiet der Biologie ) Wissenschaft von den im Wasser lebenden pflanzlichen und tierischen Organismen
Hydrobiologin
Hy d ro bio lo gin , Hy dro bio lo gin Substantiv, feminin , die |Hydrobiol o gin |die Hydrobiologin; Genitiv: der Hydrobiologin, Plural: die Hydrobiologinnen weibliche Form zu Hydrobiologe
hydrobiologisch
hy d ro bio lo gisch, hy dro bio lo gisch Adjektiv |hydrobiol o gisch |die Hydrobiologie betreffend
Hydrochinon
Hy d ro chi non , Hy dro chi non Substantiv, Neutrum Chemie , das |Hydrochin o n |2. Bestandteil zu Chinin organische Verbindung, die als starkes Reduktionsmittel in der Farbstoffindustrie eine Rolle spielt, besonders aber als fotografischer Entwickler und auch als Desinfektionsmittel verwendet wird
Hydrochorie
Hy d ro cho rie , Hy dro cho rie Substantiv, feminin Botanik , die |Hydrochor ie |die Hydrochorie; Genitiv: der Hydrochorie griechisch-neulateinisch Verbreitung von Pflanzenfrüchten und -samen durch das Wasser
Hydrocopter
Hy d ro co p ter , Hy dro cop ter Substantiv, maskulin , der |Hydroc o pter |der Hydrocopter; Genitiv: des Hydrocopters, Plural: die Hydrocopter analog zu Helikopter Fahrzeug, das mit Propeller angetrieben wird und sowohl im Wasser als auch auf dem Eis eingesetzt werden kann
Hydrodynamik
Hy d ro dy na mik, Hy dro dy na mik Substantiv, feminin Physik , die |Hydrodyn a mik |(als Teilgebiet der Strömungslehre ) Wissenschaft, Lehre von den Bewegungen der Flüssigkeiten und den dabei wirksamen Kräften
hydrodynamisch
hy d ro dy na misch, hy dro dy na misch Adjektiv Physik |hydrodyn a misch |die Hydrodynamik betreffend, auf ihren Gesetzen beruhend
hydroelektrisch
hy d ro elek t risch, hy dro elek trisch Adjektiv |hydroel e ktrisch |1 Physik, Technik elektrische Energie mit Wasserkraft erzeugend; mithilfe von Energie, die durch Wasserkraft gewonnen wird 2 Medizin Wasser und bestimmte elektrische Ströme anwendend hydroelektrische Behandlungen
Hydroelektrizität
Hy d ro elek t ri zi tät, Hy dro elek tri zi tät Substantiv, feminin , die |Hydroelektrizit ä t |die Hydroelektrizität; Genitiv: der Hydroelektrizität durch Wasserkraft erzeugte Elektrizität
Hydroelektrostation
Hy d ro elek t ro sta ti on , Hy dro elek tro sta ti on Substantiv, feminin , die |Hydroel e ktrostation |die Hydroelektrostation; Genitiv: der Hydroelektrostation, Plural: die Hydroelektrostationen Station, in der elektrische Energie durch Wasserkraft erzeugt wird
hydroenergetisch
hy d ro ener ge tisch , hy dro ener ge tisch Adjektiv Physik, Technik |hydroenerg e tisch |vom Wasser, von der Wasserkraft [an ]getrieben; die Wasserkraft nutzend
Hydrofoil
Hy d ro foil , Hy dro foil Substantiv, Neutrum , das |ˈhaɪdrəfɔɪl |das Hydrofoil; Genitiv: des Hydrofoils, Plural: die Hydrofoils englisch hydrofoil, gebildet nach aerofoil = Tragfläche, -flügel englische Bezeichnung für: Tragflächen -, Tragflügelboot
Hydrofon
Hy d ro fon , Hy d ro phon , Hy dro fon Hy dro phon Substantiv, Neutrum , das Hydrophon |Hydrof o n Hydroph o n |das Hydrofon; Genitiv: des Hydrofons, Plural: die Hydrofone das Hydrophon; Genitiv: des Hydrophons, Plural: die Hydrophone Gerät zur Aufnahme der Schwingungen von Schallwellen bei seismischen Messungen in Gewässern, auch zur Ortung von Fischschwärmen verwendet
hydrogam
hy d ro gam , hy dro gam Adjektiv Botanik |hydrog a m |(von Pflanzen ) wasserblütig, die Pollen durch Wasser übertragend
Hydrogamie
Hy d ro ga mie , Hy dro ga mie Substantiv, feminin Botanik , die |Hydrogam ie |die Hydrogamie; Genitiv: der Hydrogamie Wasserblütigkeit; Bestäubung von Blüten unter Wasser bzw. Übertragung des Pollens durch Wasser
Hydrogel
Hy d ro gel , Hy dro gel Substantiv, Neutrum , das |Hydrog e l |das Hydrogel; Genitiv: des Hydrogels, Plural: die Hydrogele griechisch ; lateinisch aus wässriger kolloidaler Lösung ausgeschiedener Stoff
Hydrogen
Hy d ro gen , Hy dro gen Substantiv, Neutrum Chemie , das Hydrogenium |Hydrog e n |das Hydrogen; Genitiv: des Hydrogens französisch hydrogène, eigentlich = Wasserbildner, zu griechisch -genḗs, -gen Wasserstoff H
Hydrogenbombe
Hy d ro gen bom be , Hy dro gen bom be Substantiv, feminin , die |Hydrog e nbombe |Wasserstoffbombe
Hydrogenium
Hy d ro ge ni um , Hy dro ge ni um Substantiv, Neutrum Chemie , das Hydrogen |Hydrog e nium |das Hydrogenium; Genitiv: des Hydrogeniums französisch hydrogène, eigentlich = Wasserbildner, zu griechisch -genḗs, -gen Wasserstoff H
Hydrogenkarbonat
Hy d ro gen kar bo nat , Hy dro gen kar bo nat Substantiv, Neutrum , das |Hydrog e nkarbonat |das Hydrogenkarbonat; Genitiv: des Hydrogenkarbonats, Plural: die Hydrogenkarbonate doppeltkohlensaures Salz mit Säurewasserstoffrest
Hydrogensalz
Hy d ro gen salz , Hy dro gen salz Substantiv, Neutrum , das |Hydrog e nsalz |das Hydrogensalz; Genitiv: des Hydrogensalzs, Plural: die Hydrogensalze Salz mit Säurewasserstoff im Molekül
Hydrogeografie
Hy d ro geo gra fie , Hy d ro geo gra phie, Hy dro geo gra fie Hy dro ge o gra phie Substantiv, feminin , die Hydrogeographie |Hydrogeograf ie Hydrogeograph ie |die Hydrogeografie; Genitiv: der Hydrogeografie die Hydrogeographie; Genitiv: der Hydrogeographie Teilgebiet der Geografie, das sich mit der Verteilung des Wassers auf und unter der Erde beschäftigt
Hydrogeologe
Hy d ro geo lo ge , Hy dro geo lo ge Substantiv, maskulin , der |Hydrogeol o ge |der Hydrogeologe; Genitiv: des Hydrogeologen, Plural: die Hydrogeologen Wissenschaftler auf dem Gebiet der Hydrogeologie
Hydrogeologie
Hy d ro geo lo gie , Hy dro geo lo gie Substantiv, feminin , die |Hydrogeolog ie |die Hydrogeologie; Genitiv: der Hydrogeologie (als Teilgebiet der Hydrologie ) Wissenschaft, Lehre von den Erscheinungen des Wassers in der Erdkruste
Hydrogeologin
Hy d ro geo lo gin , Hy dro geo lo gin Substantiv, feminin , die |Hydrogeol o gin |die Hydrogeologin; Genitiv: der Hydrogeologin, Plural: die Hydrogeologinnen weibliche Form zu Hydrogeologe
hydrogeologisch
hy d ro geo lo gisch, hy dro geo lo gisch Adjektiv |hydrogeol o gisch |die Hydrogeologie betreffend; mithilfe der Hydrogeologie
Hydrograf
Hy d ro graf , Hy d ro graph , Hy dro graf Hy dro graph Substantiv, maskulin , der Hydrograph |Hydrogr a f Hydrogr a ph |der Hydrograf; Genitiv: des Hydrografen, Plural: die Hydrografen der Hydrograph; Genitiv: des Hydrographen, Plural: die Hydrographen Wissenschaftler, Fachmann auf dem Gebiet der Hydrografie
Hydrografie
Hy d ro gra fie , Hy d ro gra phie, Hy dro gra fie Hy dro gra phie Substantiv, feminin , die Hydrographie |Hydrograf ie Hydrograph ie |die Hydrografie; Genitiv: der Hydrografie die Hydrographie; Genitiv: der Hydrographie -grafie Gewässerkunde
Hydrografin
Hy d ro gra fin , Hy d ro gra phin, Hy dro gra fin Hy dro gra phin Substantiv, feminin , die Hydrographin |Hydrogr a fin Hydrogr a phin |die Hydrografin; Genitiv: der Hydrografin, Plural: die Hydrografinnen die Hydrographin; Genitiv: der Hydrographin, Plural: die Hydrographinnen weibliche Form zu Hydrograf
hydrografisch
hy d ro gra fisch , hy d ro gra phisch, hy dro gra fisch hy dro gra phisch Adjektiv hydrographisch |hydrogr a fisch hydrogr a phisch |die Hydrografie betreffend; mithilfe der Hydrografie
Hydrokarbongas
Hy d ro kar bon gas , Hy dro kar bon gas Substantiv, Neutrum , das |Hydrokarb o ngas |das Hydrokarbongas; Genitiv: des Hydrokarbongases, Plural: die Hydrokarbongase griechisch ; lateinisch ; deutsch Schwelgas
Hydrokarpie
Hy d ro kar pie , Hy dro kar pie Substantiv, feminin Botanik , die |Hydrokarp ie |die Hydrokarpie; Genitiv: der Hydrokarpie griechisch das Ausreifen von Früchten im Wasser
Hydrokineter
Hy d ro ki ne ter , Hy dro ki ne ter Substantiv, maskulin , der |Hydrokin e ter |der Hydrokineter; Genitiv: des Hydrokineters, Plural: die Hydrokineter Dampfstrahlapparat, der Kesselwasser durch Einführen von Dampf aus einem anderen Kessel erwärmt
Hydrokortison
Hy d ro kor ti son , Hy d ro cor ti son , Hy dro kor ti son Hy dro cor ti son Substantiv, Neutrum Medizin , das fachsprachlich Hydrocortison |Hydrokortis o n Hydrocortis o n |das Hydrokortison; Genitiv: des Hydrokortisons das Hydrocortison; Genitiv: des Hydrocortisons Hormon der Nebennierenrinde mit entzündungshemmender Wirkung
Hydrokultur
Hy d ro kul tur , Hy dro kul tur Substantiv, feminin Gartenbau , die |H y drokultur |1 ohne Plural das Kultivieren von Nutz- und Zierpflanzen in Behältern mit Nährlösungen anstelle des natürlichen Bodens als Träger der Nährstoffe 2 Anlage, Bepflanzung, die mit Hydrokultur 1 betrieben wird
Hydrolase
Hy d ro la se , Hy dro la se Substantiv, feminin , die |Hydrol a se |die Hydrolase; Genitiv: der Hydrolase, Plural: die Hydrolasen meist im Plural griechisch Enzym , das Verbindungen durch Anlagerung von Wasser spaltet
Hydrologe
Hy d ro lo ge , Hy dro lo ge Substantiv, maskulin , der |Hydrol o ge |der Hydrologe; Genitiv: des Hydrologen, Plural: die Hydrologen -loge Wissenschaftler, Forscher, Fachmann auf dem Gebiet der Hydrologie
Hydrologie
Hy d ro lo gie , Hy dro lo gie Substantiv, feminin , die |Hydrolog ie | -logie Wissenschaft, Lehre vom Wasser, seinen Arten, Eigenschaften und seinen Erscheinungsformen über, auf und unter der Erdoberfläche und ihren natürlichen Zusammenhängen
Hydrologin
Hy d ro lo gin , Hy dro lo gin Substantiv, feminin , die |Hydrol o gin |die Hydrologin; Genitiv: der Hydrologin, Plural: die Hydrologinnen weibliche Form zu Hydrologe
hydrologisch
hy d ro lo gisch, hy dro lo gisch Adjektiv |hydrol o gisch |die Hydrologie betreffend; mithilfe der Hydrologie
Hydrologium
Hy d ro lo gi um , Hy dro lo gi um Substantiv, Neutrum , das |Hydrol o gium |das Hydrologium; Genitiv: des Hydrologiums, Plural: die Hydrologien Wasseruhr bis ins 17. Jahrhundert in Gebrauch
Hydrolyse
Hy d ro ly se , Hy dro ly se Substantiv, feminin Chemie , die |Hydrol y se |die Hydrolyse; Genitiv: der Hydrolyse, Plural: die Hydrolysen zu griechisch lýsis = (Auf )lösung Spaltung chemischer Verbindungen durch Wasser, meist unter Mitwirkung eines Katalysators oder Enzyms
hydrolytisch
hy d ro ly tisch , hy dro ly tisch Adjektiv Chemie |hydrol y tisch |die Hydrolyse betreffend; mithilfe der Hydrolyse
Hydromantie
Hy d ro man tie , Hy dro man tie Substantiv, feminin , die |Hydromant ie |die Hydromantie; Genitiv: der Hydromantie griechisch-lateinisch Zukunftsdeutung aus Erscheinungen in und auf glänzendem Wasser besonders im Vorderen Orient
Hydromechanik
Hy d ro me cha nik, Hy dro me cha nik Substantiv, feminin , die |Hydromech a nik |(als Teilbereich der Mechanik ) die Wissenschaft, Lehre von den Gesetzmäßigkeiten ruhender und bewegter, vor allem strömender Flüssigkeiten
hydromechanisch
hy d ro me cha nisch, hy dro me cha nisch Adjektiv |hydromech a nisch |die Hydromechanik betreffend; mithilfe der Hydromechanik
Hydromeduse
Hy d ro me du se , Hy dro me du se Substantiv, feminin , die |Hydromed u se |die Hydromeduse; Genitiv: der Hydromeduse, Plural: die Hydromedusen griechisch-neulateinisch Qualle aus der Gruppe der Hydrozoen
Hydrometallurgie
Hy d ro me tal l ur gie , Hy dro me tal lur gie Substantiv, feminin , die |Hydrometallurg ie |die Hydrometallurgie; Genitiv: der Hydrometallurgie [Technik der ] Metallgewinnung aus wässrigen Metallsalzlösungen
Hydrometeore
Hy d ro me te o re , Hy dro me te o re Pluralwort , die |Hydromete o re |die Hydrometeore (Plural ) durch Verdichtung von Wasserdampf in der Atmosphäre entstehende Niederschläge z. B. Regen, Schnee, Tau
Hydrometeorologie
Hy d ro me te o ro lo gie , Hy dro me te o ro lo gie Substantiv, feminin , die |Hydrometeorolog ie |die Hydrometeorologie; Genitiv: der Hydrometeorologie (als Teilgebiet der Meteorologie ) Lehre von den Erscheinungen des Wassers in der Lufthülle in ihren Wechselwirkungen mit der Erdkruste
Hydrometer
Hy d ro me ter , Hy dro me ter Substantiv, Neutrum , das |Hydrom e ter |Gerät zur Messung der Geschwindigkeit fließenden Wassers, der Menge des durch ein Rohr strömenden Wassers, des spezifischen Gewichts von Wasser o. Ä.
Hydrometrie
Hy d ro me t rie , Hy dro me trie Substantiv, feminin , die |Hydrometr ie | -metrie a Lehre von den Verfahren und Einrichtungen zur Messung der Gewässer b Messung an Gewässern mithilfe des Hydrometers
hydrometrisch
hy d ro me t risch, hy dro me trisch Adjektiv |hydrom e trisch |die Hydrometrie betreffend; mithilfe der Hydrometrie, eines Hydrometers
Hydromikrobiologie
Hy d ro mi k ro bio lo gie , Hy dro mi kro bio lo gie Substantiv, feminin , die |Hydromikrobiolog ie |die Hydromikrobiologie; Genitiv: der Hydromikrobiologie griechisch Teilgebiet der Hydrobiologie, das sich mit der Bedeutung von Bakterien, Pilzen und Hefen für den Stoffhaushalt der Gewässer befasst
Hydromonitor
Hy d ro mo ni tor , Hy dro mo ni tor Substantiv, maskulin , der |Hydrom o nitor |der Hydromonitor; Genitiv: des Hydromonitors, Plural: die Hydromonitoren, auch Hydromonitore griechisch ; lateinisch Gerät für Erdarbeiten mit Wasserstrahl
Hydromorphie
Hy d ro mor phie, Hy dro mor phie Substantiv, feminin , die |Hydromorph ie |die Hydromorphie; Genitiv: der Hydromorphie besondere Ausbildung von Organen, die unter Wasser vorkommen z. B. Stängel und Blätter bei Wasserpflanzen
Hydromyelie
Hy d ro my e lie , Hy dro my e lie Substantiv, feminin Medizin , die |Hydromyel ie |die Hydromyelie; Genitiv: der Hydromyelie, Plural: die Hydromyelien griechisch-neulateinisch angeborene Erweiterung des mit Flüssigkeit gefüllten Zentralkanals im Rückenmark
hydronalisieren
hy d ro na li sie ren , hy dro na li sie ren schwaches Verb |hydronalis ie ren |Kunstwort mit Hydronalium überziehen
Hydronalium
Hy d ro na li um , Hy dro na li um Substantiv, Neutrum , das |Hydron a lium |das Hydronalium; Genitiv: des Hydronaliums eine wasserbeständige Aluminium-Magnesium-Legierung
Hydronephrose
Hy d ro ne ph ro se , Hy dro ne phro se Substantiv, feminin Medizin , die |Hydronephr o se |die Hydronephrose; Genitiv: der Hydronephrose, Plural: die Hydronephrosen griechisch-neulateinisch durch Harnstauung verursachte Erweiterung des Nierenbeckens Sackniere, Stauungsniere
Hydronfarbstoff
Hy d ron farb stoff , Hy dron farb stoff Substantiv, maskulin , der |Hydr o nfarbstoff |der Hydronfarbstoff; Genitiv: des Hydronfarbstoff [e ]s, Plural: die Hydronfarbstoffe griechisch ; deutsch Schwefelfarbstoff z. B. Hydronblau
Hydronymie
Hy d ro ny mie , Hy dro ny mie Substantiv, feminin , die |Hydronym ie |die Hydronymie; Genitiv: der Hydronymie Gesamtheit der Gewässernamen; vorhandener Bestand an Namen von Gewässern, besonders von Flüssen
Hydropath
Hy d ro path , Hy dro path Substantiv, maskulin , der |Hydrop a th | -path jemand, der Patienten mit Mitteln der Hydrotherapie 2 behandelt
Hydropathie
Hy d ro pa thie, Hy dro pa thie Substantiv, feminin Medizin , die |Hydropath ie | -pathie (als Teilbereich der Medizin ) Lehre von der Heilbehandlung durch Anwendung von Wasser
Hydropathin
Hy d ro pa thin , Hy dro pa thin Substantiv, feminin , die |Hydrop a thin |weibliche Form zu Hydropath
hydropathisch
hy d ro pa thisch, hy dro pa thisch Adjektiv Medizin |hydrop a thisch |die Hydropathie betreffend, auf ihr beruhend, zu ihr gehörend
Hydroperikard
Hy d ro pe ri kard, Hy dro pe ri kard Substantiv, Neutrum Medizin , das Hydroperikardium |Hydroperik a rd |das Hydroperikard; Genitiv: des Hydroperikard [e ]s, Plural: die Hydroperikarde Ansammlung größerer Flüssigkeitsmengen im Herzbeutelraum
Hydroperikardium
Hy d ro pe ri kar di um , Hy dro pe ri kar di um Substantiv, Neutrum Medizin , das Hydroperikard |Hydroperik a rdium |das Hydroperikardium; Genitiv: des Hydroperikardiums, Plural: die Hydroperikardien Ansammlung größerer Flüssigkeitsmengen im Herzbeutelraum
Hydrophan
Hy d ro phan, Hy dro phan Substantiv, maskulin , der |Hydroph a n |der Hydrophan; Genitiv: des Hydrophans, Plural: die Hydrophane als Schmuckstein beliebter, milchiger, durch Wasserverlust getrübter Opal, der durch Wasseraufnahme vorübergehend durchscheinend wird
hydrophil
hy d ro phil , hy dro phil Adjektiv |hydroph i l |zu griechisch phileĩn = lieben 1 Biologie (von Tieren und Pflanzen ) im oder am Wasser lebend 2 Chemie, Technik Wasser, Feuchtigkeit anziehend, aufnehmend
Hydrophilie
Hy d ro phi lie , Hy dro phi lie Substantiv, feminin Chemie, Technik , die |Hydrophil ie |die Hydrophilie; Genitiv: der Hydrophilie zu griechisch philía = Liebe, Zuneigung (von bestimmten Stoffen ) Eigenschaft, Wasser anzuziehen; Bestreben, Wasser aufzunehmen
hydrophob
hy d ro phob, hy dro phob Adjektiv |hydroph o b |lateinisch hydrophobus < griechisch hydrophóbos 1 Biologie (von Tieren und Pflanzen ) in feuchten Lebensräumen in der Regel nicht vorkommend 2 Chemie, Technik Wasser, Feuchtigkeit abstoßend; nicht in Wasser löslich
Hydrophobie
Hy d ro pho bie , Hy dro pho bie Substantiv, feminin , die |Hydrophob ie |die Hydrophobie; Genitiv: der Hydrophobie, Plural: die Hydrophobien griechisch hydrophobía, Phobie 1 Biologie Bestreben bestimmter Tiere und Pflanzen, das Wasser zu meiden 2 Medizin krankhafte Wasserscheu bei Menschen und Tieren, besonders als Begleiterscheinung bei Tollwut
hydrophobieren
hy d ro pho bie ren , hy dro pho bie ren schwaches Verb |hydrophob ie ren |griechisch-lateinisch-neulateinisch (besonders Fassaden, Bauteile, Textilien ) so ausrüsten, dass sie Wasser abweisen
Hydrophobierung
Hy d ro pho bie rung , Hy dro pho bie rung Substantiv, feminin , die |Hydrophob ie rung |die Hydrophobierung; Genitiv: der Hydrophobierung, Plural: die Hydrophobierungen (Plural selten ) 1 das Hydrophobieren 2 Appretur , durch die Textilien wasserabweisend werden
Hydrophor
Hy d ro phor, Hy dro phor Substantiv, maskulin , der |Hydroph o r |der Hydrophor; Genitiv: des Hydrophors, Plural: die Hydrophore griechisch-neulateinisch Druckkessel in Wasserversorgungsanlagen und Feuerspritzen
Hydrophoren
Hy d ro pho ren , Hy dro pho ren Pluralwort , die |Hydroph o ren |die Hydrophoren (Plural ) griechisch Wasserträger [innen ] häufiges Motiv der griechischen Kunst
Hydrophthalmus
Hy d ro ph thal mus , Hy droph thal mus Substantiv, maskulin Medizin , der |Hydrophth a lmus |der Hydrophthalmus; Genitiv: des Hydrophthalmus, Plural: die Hydrophthalmi griechisch-neulateinisch ; »Wasserauge «Vergrößerung des Augapfels infolge übermäßiger Ansammlung von Flüssigkeit im Auge
Hydrophyt
Hy d ro phyt, Hy dro phyt Substantiv, maskulin Botanik , der |Hydroph y t |Wasserpflanze
hydropigen
hy d ro pi gen , hy dro pi gen Adjektiv Medizin |hydropig e n |Wassersucht erzeugend von Krankheiten
hydropisch
hy d ro pisch, hy dro pisch Adjektiv Medizin |hydr o pisch |griechisch-lateinisch wassersüchtig, an Wassersucht leidend
Hydroplan
Hy d ro plan , Hy dro plan Substantiv, maskulin , der |Hydropl a n |der Hydroplan; Genitiv: des Hydroplans, Plural: die Hydroplane griechisch-neulateinisch 1 Wasserflugzeug 2 Gleitboot
hydropneumatisch
hy d ro pneu ma tisch , hy dro pneu ma tisch Adjektiv Technik |hydropneum a tisch österreichisch auch …ˈmat …|mit einem gasförmigen Stoff und einer Flüssigkeit gleichzeitig betrieben eine hydropneumatische Federung
Hydroponik
Hy d ro po nik, Hy dro po nik Substantiv, feminin Gartenbau , die |Hydrop o nik |die Hydroponik; Genitiv: der Hydroponik zu griechisch pónos = Arbeit Hydrokultur
hydroponisch
hy d ro po nisch, hy dro po nisch Adjektiv Gartenbau |hydrop o nisch |die Hydroponik betreffend; mithilfe der Hydroponik
Hydrops
Hy d rops, Hy drops Substantiv, maskulin Medizin , der Hydropsie |H y drops |griechisch hýdrōps, zu: ṓps = Aussehen (durch verschiedene Krankheiten, z. B. Herzinsuffizienz, verursachte ) Ansammlung seröser Flüssigkeit im Gewebe, in Gelenken oder in Körperhöhlen; Wassersucht
Hydropsie
Hy d rop sie , Hy drop sie Substantiv, feminin Medizin , die Hydrops |Hydrops ie |griechisch hýdrōps, zu: ṓps = Aussehen (durch verschiedene Krankheiten, z. B. Herzinsuffizienz, verursachte ) Ansammlung seröser Flüssigkeit im Gewebe, in Gelenken oder in Körperhöhlen; Wassersucht
Hydropulsator
Hy d ro pul sa tor , Hy dro pul sa tor Substantiv, maskulin , der Hydropulsor |Hydropuls a tor |der Hydropulsator; Genitiv: des Hydropulsators, Plural: die Hydropulsatoren griechisch ; lateinisch Pumpe, bei der ein Treibflüssigkeitsstrom die Pumpleistung erbringt
Hydropulsor
Hy d ro pul sor , Hy dro pul sor Substantiv, maskulin , der Hydropulsator |Hydrop u lsor |der Hydropulsor; Genitiv: des Hydropulsors, Plural: die Hydropulsoren griechisch ; lateinisch Pumpe, bei der ein Treibflüssigkeitsstrom die Pumpleistung erbringt
Hydrorrhachie
Hy d ror rha chie, Hy dror rha chie Substantiv, feminin , die |Hydrorrhach ie |die Hydrorrhachie; Genitiv: der Hydrorrhachie, Plural: die Hydrorrhachien Hydromyelie
Hydrorrhö
Hy d ror rhö, Hy dror rhö Substantiv, feminin Medizin , die |Hydrorrh ö |die Hydrorrhö, Hydrorrhöen griechisch-neulateinisch wässriger Ausfluss
Hydrosalz
Hy d ro salz , Hy dro salz , das Hydrogensalz |H y drosalz |
Hydrosol
Hy d ro sol , Hy dro sol Substantiv, Neutrum Chemie , das |Hydros o l |das Hydrosol; Genitiv: des Hydrosols, Plural: die Hydrosole griechisch ; lateinisch kolloidale Lösung mit Wasser als Lösungsmittel
Hydrosphäre
Hy d ro sphä re , Hy dro sphä re Substantiv, feminin Geologie , die |Hydrosph ä re |aus den Meeren, den Binnengewässern, dem Grundwasser, dem im Eis gebundenen und in der Atmosphäre vorhandenen Wasser bestehende Wasserhülle b der Erde
Hydrostatik
Hy d ro sta tik, Hy dro sta tik Substantiv, feminin Physik , die |Hydrost a tik |Wissenschaft, Lehre vom Gleichgewicht der in ruhenden Flüssigkeiten und auf ruhende Flüssigkeiten wirkenden Kräfte
hydrostatisch
hy d ro sta tisch , hy dro sta tisch Adjektiv Physik |hydrost a tisch |auf den Gesetzen der Hydrostatik beruhend hydrostatischer Druck (im Inneren einer ruhenden Flüssigkeit herrschender Druck, der in jeder Richtung gleich groß ist )
Hydrostößel
Hy d ro stö ßel, Hy dro stö ßel Substantiv, maskulin Kfz-Technik , der |H y drostößel |meist im Plural das Ventilspiel hydraulisch regelnder Stößel in Diesel- und Ottomotoren
Hydrotechnik
Hy d ro tech nik, Hy dro tech nik Substantiv, feminin , die |Hydrot e chnik |Technik des Wasserbaus
hydrotechnisch
hy d ro tech nisch, hy dro tech nisch Adjektiv |hydrot e chnisch |die Hydrotechnik betreffend; mit den Mitteln der Hydrotechnik
hydrotherapeutisch
hy d ro the ra peu tisch , hy dro the ra peu tisch Adjektiv Medizin |hydrotherap eu tisch auch ˈhyːdro …|die Hydrotherapie betreffend; mithilfe der Hydrotherapie
Hydrotherapie
Hy d ro the ra pie , Hy dro the ra pie Substantiv, feminin Medizin , die |H y drotherapie auch …ˈpiː |1 ohne Plural Hydropathie 2 Heilbehandlung durch Anwendung von Wasser in Form von Bädern, Waschungen, Güssen, Dämpfen o. Ä.
hydrothermal
hy d ro ther mal , hy dro ther mal Adjektiv Geologie |hydrotherm a l |(von Erzen und anderen Mineralien ) aus verdünnten Lösungen ausgeschieden
Hydrothorax
Hy d ro tho rax , Hy dro tho rax Substantiv, maskulin Medizin , der |Hydroth o rax |der Hydrothorax; Genitiv: des Hydrothorax [es ] griechisch ; lateinisch bei Herzinsuffizienz und Brustfellentzündung auftretende Ansammlung seröser, wässriger Flüssigkeit in der Brusthöhle
Hydroxid
Hy d ro xid, Hy d ro xyd, Hy dro xid Hy dro xyd Substantiv, Neutrum Chemie , das Hydroxyd |Hydrox i d Hydrox y d |das Hydroxid; Genitiv: des Hydroxid [e ]s, Plural: die Hydroxide das Hydroxyd; Genitiv: des Hydroxyd [e ]s, Plural: die Hydroxyde zu Hydrogen und Oxid anorganische Verbindung mit einer oder mehreren funktionellen 1a Hydroxylgruppen
Hydroxidion
Hy d ro xid ion , Hy d ro xyd ion , Hy dro xid ion Hy dro xyd ion Substantiv, Neutrum , das Hydroxydion |Hydrox i dion Hydrox y dion |das Hydroxidion; Genitiv: des Hydroxidions, Plural: die Hydroxidionen das Hydroxydion; Genitiv: des Hydroxydions, Plural: die Hydroxydionen in Hydroxiden enthaltenes einwertiges Anion
hydroxidisch
hy d ro xi disch, hy d ro xy disch, hy dro xi disch hy dro xy disch Adjektiv Chemie hydroxydisch |hydrox i disch hydrox y disch |(von chemischen Verbindungen ) Hydroxide enthaltend
Hydroxylamin
Hy d ro xy l a min , Hy dro xy lamin Substantiv, Neutrum Chemie , das |Hydroxylam i n |das Hydroxylamin; Genitiv: des Hydroxylamins zu Hydroxyl- (Hydroxylgruppe ) und Amin stark hygroskopische und explosible chemische Verbindung, deren stark giftige Salze als Reduktionsmittel verwendet werden
Hydroxylgruppe
Hy d ro xyl grup pe , Hy dro xyl grup pe Substantiv, feminin Chemie , die |Hydrox y lgruppe |die Hydroxylgruppe; Genitiv: der Hydroxylgruppe, Plural: die Hydroxylgruppen gekürzt aus Hydrogen , Oxygen und griechisch hýlē, Hyle in chemischen Verbindungen häufig auftretende, aus einem Atom Wasserstoff und einem Atom Sauerstoff bestehende Gruppe; OH-Gruppe
Hydrozele
Hy d ro ze le , Hy dro ze le Substantiv, feminin Medizin , die |Hydroz e le |die Hydrozele; Genitiv: der Hydrozele, Plural: die Hydrozelen griechisch-lateinisch Ansammlung von Flüssigkeit in einer Zyste am Hoden oder am Samenstrang; Wasserbruch
Hydrozephalus
Hy d ro ze pha lus, Hy dro ze pha lus Substantiv, maskulin Medizin , der |Hydroz e phalus |der Hydrozephalus; Genitiv: des Hydrozephalus, Plural: die Hydrozephalen zu griechisch kephalḗ = Kopf abnorme Vergrößerung des Schädels infolge übermäßiger Ansammlung von Flüssigkeit; Wasserkopf
Hydrozoon
Hy d ro zo on , Hy dro zo on Substantiv, Neutrum , das |Hydroz o on |das Hydrozoon; Genitiv: des Hydrozoons, Plural: die Hydrozoen meist im Plural zu griechisch zõon = Lebewesen, Tier zu den Nesseltieren gehörendes, im Wasser lebendes Tier, das meist in Kolonien entweder am Grund festsitzt oder im Wasser umherschwimmt
Hydrozyklon
Hy d ro zy k lon, Hy dro zy klon Substantiv, maskulin Technik , der |Hydrozykl o n |der Hydrozyklon; Genitiv: des Hydrozyklons, Plural: die Hydrozyklone a Vorrichtung zur Abwasserreinigung b Vorrichtung zur Aufbereitung von Erz
French Dictionary
hydrocarbure
hydrocarbure n. m. nom masculin chimie Composé comportant uniquement du carbone et de l ’hydrogène. : L ’essence est un hydrocarbure. Mélangé avec un hydrocarbure comme diesel, le nitrate d ’ammonium peut être utilisé comme explosif.
hydrocution
hydrocution n. f. nom féminin Syncope qui fait couler à pic un baigneur.
hydroélectricité
hydroélectricité n. f. nom féminin Énergie électrique produite par l ’eau (d ’un cours d ’eau, d ’une chute ).
hydroélectrique
hydroélectrique adj. adjectif Relatif à l ’hydroélectricité. : Énergie hydroélectrique. Les ressources hydroélectriques du Québec sont très grandes.
hydrofuge
hydrofuge adj. et n. m. adjectif Se dit d ’un produit qui préserve de l ’humidité, imperméable. : Des substances hydrofuges. nom masculin : Un hydrofuge efficace.
hydrofuger
hydrofuger v. tr. verbe transitif Imperméabiliser. : Ils hydrofugeaient des tissus. changer Conjugaison Le g est suivi d ’un e devant les lettres a et o. Il hydrofugea, nous hydrofugeons.
hydrogène
hydrogène n. m. nom masculin Symbole H (s ’écrit sans point ). Corps simple gazeux extrêmement léger. Note Technique Attention au genre masculin de ce nom: un hydrogène.
hydrogéné
hydrogéné , ée adj. adjectif Combiné avec de l ’hydrogène.
hydrogéner
hydrogéner v. tr. verbe transitif Combiner avec l ’hydrogène. aliéner
hydroglisseur
hydroglisseur n. m. nom masculin Bateau conçu pour glisser sur l ’eau.
hydromassage
hydromassage n. m. Massage par jet d ’eau sous pression. : Cette baignoire est proposée en version à remous, en version à hydromassage ou en version combinée remous /hydromassage.
hydromel
hydromel n. m. nom masculin Boisson faite d ’eau et de miel. Note Technique Attention au genre masculin de ce nom: un hydromel.
hydrophile
hydrophile adj. adjectif Qui absorbe l ’eau. Coton hydrophile. médecine Coton blanchi dont on se sert pour les pansements. : Recouvrir la plaie avec un coton hydrophile (et non *absorbant ).
Sanseido Wisdom Dictionary
hydro
hy dro /háɪdrə /形容詞 1 =hydroelectric .2 =hydropathic .名詞 複 ~s 1 C ⦅英 ⦆水治療施設 .2 U C ⦅カナダ ⦆水力電気 ; 水力発電 (所 ).
hydro-
hy dro- /háɪdroʊ /複合要素 水の ; 水素の (!母音の前では通例hydr -) .
hydrocarbon
h ỳ dro c á rbon 名詞 U 〘化 〙炭化水素 .
hydrocephalic
h ỳ dro ceph á lic 形容詞 名詞 C 〘医 〙水頭症の (患者 ).
hydrocephalus
h ỳ dro c é ph a lus /-séf (ə )ləs |-kéf -/名詞 U 〘医 〙脳水腫 (しゆ ).
hydrochloric
hy dro chlo ric /hàɪdrəklɔ́ːrɪk |-klɔ́r -/形容詞 〘化 〙塩化水素の .~̀ á cid 塩酸 .
hydrodynamic
h ỳ dro dyn á mic 形容詞 流体力学の .
hydrodynamics
h ỳ dro dyn á mics 名詞 U 流体力学 .
hydroelectric
h ỳ dro el é ctric 形容詞 水力電気 [発電 ]の ▸ a hydroelectric power plant 水力発電所
hydroelectricity
h ỳ dro electr í city 名詞 U 水力電気 .
hydrofoil
hy dro foil /háɪdrəfɔ̀ɪl /名詞 C 水中翼船 ; ハイドロフォイル .
hydrogen
hy dro gen /háɪdrədʒ (ə )n / (!( -genは /dʒ (ə )n /)) 〖hydro (水 )gen (を発生させるもの )〗名詞 U 〘化 〙水素 〘非金属元素; ⦅記号 ⦆ H 〙.~́ b ò mb 水素爆弾 (H-bomb, fusion bomb ).~̀ b ó nd 〘化 〙水素結合 .~́ ì on 〘化 〙水素イオン .~̀ per ó xide 〘化 〙過酸化水素 (peroxide ).~̀ s ú lfide [s ú lphide ]〘化 〙硫化水素 .
hydrogenate
hy dro gen ate /haɪdrɑ́dʒənèɪt |háɪdrədʒ -/動詞 他動詞 〘化 〙…を水素と化合させる, …に水素を付加する .
hydrology
hy drol o gy /haɪdrɑ́lədʒi |-drɔ́l -/名詞 U 水文学 〘陸地上における水の性質を扱う地学の一分野 〙.
hydropathic
hy dro path ic /hàɪdrəpǽθɪk /形容詞 水治療 (法 )の .
hydropathy
hy drop a thy /hàɪdrɑ́pəθi |-drɔ́p -/名詞 U 水治療 (法 ).
hydrophobia
h ỳ dro ph ó bia 名詞 U 1 〘医 〙恐水病, 狂犬病 .2 水への (病的 )恐怖 .
hydroplane
h ý dro pl à ne 名詞 C 1 水上滑走艇, 高速モーターボート .2 ⦅古 ⦆水上飛行機 (seaplane ).3 (潜水艦を昇降させる )水平 舵 (だ ).4 水中翼船 (hydrofoil ).動詞 自動詞 1 水上滑走艇に乗る ; 水上を滑走する .2 ⦅主に米 ⦆〈車などが 〉ハイドロプレーン現象を起こす .
hydroponic
hy dro pon ic /hàɪdrəpɑ́nɪk |-pɔ́n -/形容詞 〘農 〙水栽培の ; 水耕法の .
hydroponics
h ỳ dro p ó n ics 名詞 U 〘農 〙水栽培, 水耕法 .
hydrotherapy
h ỳ dro th é r a py 名詞 U 水治療法 (hydropathy ) 〘温泉や鉱泉を利用 〙.
hydroxide
hy drox ide /haɪdrɑ́ksaɪd |-drɔ́k -/名詞 U 〘化 〙水酸化物 .