| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024gal•li•um (gal′ē əm),USA pronunciation n. [Chem.]- Chemistrya rare, steel-gray, trivalent metallic element used in high-temperature thermometers because of its high boiling point (1983°C) and low melting point (30°C). Symbol: Ga;
at. wt.: 69.72;
at. no.: 31;
sp. gr.: 5.91 at 20°C.
- Neo-Latin, equivalent. to Latin gall(us) cock (translation of French coq, from Lecoq de Boisbaudran, 19th-century French chemist) + Neo-Latin -ium -ium
- 1870–75
Collins Concise English Dictionary © HarperCollins Publishers:: gallium /ˈɡælɪəm/ n - a silvery metallic element that is liquid for a wide temperature range. It occurs in trace amounts in some ores and is used in high-temperature thermometers and low-melting alloys. Gallium arsenide is a semiconductor. Symbol: Ga; atomic no: 31; atomic wt: 69.723; valency: 2 or 3; relative density: 5.904; melting pt: 29.77°C; boiling pt: 2205°C
Etymology: 19th Century: from New Latin, from Latin gallus cock, translation of French coq in the name of its discoverer, Lecoq de Boisbaudran, 19th-century French chemist |