单词 | beryllium |
释义 | beryllium /beuh ril"ee euhm/, n. Chem. a steel-gray, bivalent, hard, light, metallic element, the salts of which are sweet: used chiefly in copper alloys for better fatigue endurance, in springs, and in electrical contacts. Symbol: Be; at. wt.: 9.0122; at. no.: 4; sp. gr.: 1.8 at 20° C. [1860-65; < L beryll(us) BERYL + -IUM] |
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