Thesaurus: osmium

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1. n. 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.
2. n. a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
3. 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.
4. A rare metallic element of the platinum group, found native asan alloy in platinum ore, and in iridosmine. It is a hard, infusible,bluish or grayish white metal, and the heaviest substance known. Itstetroxide is used in histological experiments to stain tissues.Symbol Os. Atomic weight 191.1. Specific gravity 22.477.
5. n:100 n. a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known