| 单词 | osmium |
| 释义 | Word Frequency osmium(ˈɒzmɪəm) noun a very hard brittle bluish-white metal occurring with platinum and alloyed with iridium in osmiridium: used to produce platinum alloys, mainly for pen tips and instrument pivots, as a catalyst, and in electric-light filaments. Symbol: Os; atomic no: 76; atomic wt: 190.2; valency: 0 to 8; relative density: 22.57; melting pt: 3033±30°C; boiling pt: 5012±100°C Word origin C19: from Greek osmē smell, so called from its penetrating odour |
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