| 单词 | potassium |
| 释义 | potassium /peuh tas"ee euhm/, n. Chem. a silvery-white metallic element that oxidizes rapidly in the air and whose compounds are used as fertilizer and in special hard glasses. Symbol: K; at. wt.: 39.102; at. no.: 19; sp. gr.: 0.86 at 20°C. [1800-10; < NL; see POTASSA, -IUM] |
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