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osmium |
3 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Osmium \Os"mi*um\, n. [Gr. ? a smell, odor, akin to ? to smell. So named in allusion to the strong chlorinelike odor of osmic tetroxide. See {Odor}.] (Chem.) A rare metallic element of the platinum group found native as an alloy in platinum ore, and in iridosmine. It is a hard, infusible, bluish or grayish white metal, and the heaviest substance known Its tetroxide is used in histological experiments to stain tissues. Symbol {Os}. Atomic weight 191.1. Specific gravity 22.477. From WordNet r 1.6 [wn]: osmium n : a hard brittle blue-gray or blue-black metallic element that is one of the platinum metals; the heaviest metal known [syn: {Os}, {atomic number 76}] From Elements database 20001107 [elements]: osmium Symbol: Os Atomic number: 76 Atomic weight: 190.2 Hard blue-white metallic transition element. Found with platinum and used in some alloys with platinum and iridium.
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