| 单词 | magnesium |
| 释义 | magnesium /mag nee"zee euhm, -zheuhm, -shee euhm/, n. Chem. a light, ductile, silver-white, metallic element that burns with a dazzling white light, used in lightweight alloys, flares, fireworks, in the manufacture of flashbulbs, optical mirrors, and precision instruments, and as a zinc substitute in batteries. Symbol: Mg; at. wt.: 24.312; at. no.: 12; sp. gr.: 1.74 at 20°C. [1800-10; < NL; see MAGNESIA, -IUM] |
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