| 单词 | vanadium |
| 释义 | vanadium /veuh nay"dee euhm/, n. Chem. a rare element occurring in certain minerals and obtained as a light-gray powder with a silvery luster or as a ductile metal: used as an ingredient of steel to toughen it and increase its shock resistance. Symbol: V; at. wt.: 50.942; at. no.: 23; sp. gr.: 5.96. [ < NL (1830) < Icel Vanad(ís) epithet of Freya (Vana, gen. of Vanir VANIR + dís goddess) + NL -ium -IUM] |
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