| 单词 | beryllium |
| 释义 | beryllium in British English (bɛˈrɪlɪəm) noun a corrosion-resistant toxic silvery-white metallic element that occurs chiefly in beryl and is used mainly in X-ray windows and in the manufacture of alloys. Symbol: Be; atomic no: 4; atomic wt: 9.012; valency: 2; relative density: 1.848; melting pt: 1289°C; boiling pt: 2472°C Former names: glucinum, gluciniumWord origin C19: from Latin bēryllus, from Greek bērullos, berylberyllium in American English (bəˈrɪliəm) noun a hard, silver-white, metallic chemical element, one of the alkaline-earth metals,found only in combination with others: it forms strong, hard, lightweight alloys with several metals: symbol, Be; at. no., 4 Word origin < beryllia, beryllium oxide (< L beryllus, beryl + -ia) + -ium: discovered (1798) by L. N. Vauquelin (1763-1829), Fr chemistExamples of 'beryllium' in a sentence |
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