Webster's 1828 Dictionary

ALLANTOIS, ALLANTOID

n.[Gr. a sausage, and form. ] A thin membrane, situated between the chorion and amnios in quadrupeds, and forming one of the membranes which invest the fetus in those animals.

 

Webster's 1913 Dictionary

ALLANTOIC

Al `lan *to "ic, a. Etym: [Cf. F. allantoïque.]

 

Defn: Pertaining to, or contained in, the allantois. Allantoic acid. (Chem. ) See Allantoin.

 

ALLANTOID; ALLANTOIDAL

Al *lan "toid, Al `lan *toid "al, a. Etym: [Gr. (Anat. )

 

Defn: Of or pertaining to the allantois.

 

ALLANTOIDEA

Al `lan *toid "e *a, n. pl. Etym: [NL. ] (Zoöl.)

 

Defn: The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals.

 

ALLANTOIN

ALLANTOIN Al *lan "to *in, n. (Chem. )

 

Defn: A crystalline, transparent, colorless substance found in the allantoic liquid of the fetal calf; -- formerly called allantoic acid and amniotic acid.

 

ALLANTOIS; ALLANTOID

ALLANTOIS; ALLANTOID Al *lan "to *is, Al *lan "toid, } n.. (Anat. )

 

Defn: A membranous appendage of the embryos of mammals, birds, and reptiles, -- in mammals serving to connect the fetus with the parent; the urinary vesicle.

 

New American Oxford Dictionary

allantoin

al lan to in |əˈlantō -in əˈlæntoʊən | ▶noun Biochemistry a crystalline compound formed in the nitrogen metabolism of many mammals (excluding primates ). [A cyclic compound related to hydantoin; chem. formula: C 4 H 6 N 4 O 3. ] ORIGIN mid 19th cent.: from allantois (because it was discovered in the allantoic fluid of cows ) + -in 1 .

 

allantois

al lan to is |əˈlantō -is əˈlæntəwəs | ▶noun ( pl. allantoides |ˌalənˈtō -idēz | ) the fetal membrane lying below the chorion in many vertebrates, formed as an outgrowth of the embryo's gut. In birds and reptiles it grows to surround the embryo; in eutherian mammals it forms part of the placenta. DERIVATIVES al lan to ic |ˌalənˈtō -ik |adjective, al lan toid |-toid |adjective ORIGIN mid 17th cent.: modern Latin, based on Greek allantoeidēs ‘sausage-shaped. ’

 

Oxford Dictionary

allantoin

allantoin |əˈlantəʊɪn | ▶noun [ mass noun ] Biochemistry a crystalline compound formed in the nitrogen metabolism of many mammals (excluding primates ). ●A cyclic compound related to hydantoin; chem. formula: C 4 H 6 N 4 O 3. ORIGIN mid 19th cent.: from allantois (because it was discovered in the allantoic fluid of cows ) + -in 1 .

 

allantois

allantois |əˈlantəʊɪs | ▶noun ( pl. allantoides |-ɪdiːz | ) the fetal membrane lying below the chorion in many vertebrates, formed as an outgrowth of the embryo's gut. In birds and reptiles it grows to surround the embryo; in eutherian mammals it forms part of the placenta. DERIVATIVES allantoic |alənˈtəʊɪk |adjective, allantoid |əˈlantɔɪd |adjective ORIGIN mid 17th cent.: modern Latin, based on Greek allantoeidēs ‘sausage-shaped ’.

 

Duden Dictionary

Allantoin

Al lan to in Substantiv, Neutrum Chemie , das |Allanto i n |das Allantoin; Genitiv: des Allantoins zu griechisch allãs (Genitiv: allãntos ) = Wurst, nach der Form (als Naturstoff in vielen Pflanzen und im Harn bestimmter Tiere vorkommendes ) Produkt des Harnstoffwechsels

 

Allantois

Al lan to is Substantiv, feminin , die |All a ntois |die Allantois; Genitiv: der Allantois Urharnsack embryonales Organ der Reptilien, Vögel und Säugetiere einschließlich des Menschen

 

French Dictionary

allant

allant , ante adj. et n. m. adjectif littéraire Actif. nom masculin Ardeur. : Avoir de l ’allant. SYNONYME énergie ; entrain .