| 单词 | praseodymium |
| 释义 | praseodymium /pray'zee oh dim"ee euhm, pray'see-/, n. Chem. a rare-earth, metallic, trivalent element, named from its green salts. Symbol: Pr; at. wt.: 140.91; at. no.: 59; sp. gr.: 6.77 at 20°C. [1880-85; < NL, equiv. to praseo- (comb. form repr. Gk prásios leek-green; see PRASE) + (DI)DYMIUM] |
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