English-Thai Dictionary

iridium

N ธาตุ โลหะช นิดหนึ่ง 

 

Webster's 1828 Dictionary

IRIDIUM

n.[from iris. ] A metal of a whitish color, not malleable, found in the ore of platinum, and in a native allow with osmium. Its specific gravity is above 18. It takes its name from the variety of colors which it exhibits while dissolving in muriatic acid. The native allow with osmium, or native iridium, is of a steel gray color and shining metallic luster. It usually occurs in small irregular flat grains, in alluvial soil, in S. America.

 

Webster's 1913 Dictionary

IRIDIUM

I *rid "i *um, n. Etym: [NL. , fr. L. iris, iridis, the rainbow. So called from the iridescence of some of its solutions. See Iris. ] (Chem. )

 

Defn: A rare metallic element, of the same group as platinum, which it much resembles, being silver-white, but harder, and brittle, and indifferent to most corrosive agents. With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4.Symbol Ir. Atomic weight 192.5.

 

Note: Iridium usually occurs as a native alloy with osmium (iridosmine or osmiridium ), which may occur alone or with platinum. Iridium, as an alloy with platinum, is used in bushing the vents of heavy ordnance. It is also used for the points of gold pens, and in a finely powdered condition (iridium black ), for painting porcelain black.

 

New American Oxford Dictionary

iridium

i rid i um |iˈridēəm ɪˈrɪdiəm | ▶noun the chemical element of atomic number 77, a hard, dense silvery-white metal. (Symbol: Ir ) ORIGIN early 19th cent.: modern Latin, from Latin iris, irid- ‘rainbow ’ (so named because it forms compounds of various colors ).

 

Oxford Dictionary

iridium

iridium |ɪˈrɪdɪəm, ʌɪ -| ▶noun [ mass noun ] the chemical element of atomic number 77, a hard, dense silvery-white metal. (Symbol: Ir ) ORIGIN early 19th cent.: modern Latin, from Latin iris, irid- ‘rainbow ’ (so named because it forms compounds of various colours ).

 

Duden Dictionary

Iridium

Iri di um Substantiv, Neutrum , das |Ir i dium |das Iridium; Genitiv: des Iridiums englisch iridium, zu griechisch ĩris (Genitiv: íridos ) = Regenbogen; nach den bunten Farben, die einige seiner Salze zeigen silberglänzendes, sehr hartes Metall, das in Legierungen für Platinschmuck, Injektionsnadeln, elektrische Kontakte u. a. verwendet wird chemisches Element Ir

 

Sanseido Wisdom Dictionary

iridium

i rid i um /ɪrɪ́diəm, aɪr -/名詞 U 〘化 〙イリジウム 〘プラチナ合金に使用される白金属元素; ｟記号 ｠Ir 〙.