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| os·mi·um [ ózmee əm ] |
noun |
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| Definition: |
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hard white metallic element: a hard white crystalline metallic element, the densest known. Source: osmiridium. Use: catalyst, alloyed with iridium for pen nibs.
Symbol Os
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| [Early 19th century. < modern Latin< Greek osmē "smell"; from the pungent smell of osmium oxides] |
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