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WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
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WORDNET DICTIONARY
Noun Osmium has 1 sense
- osmium(n = noun.substance) atomic number 76, os - a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known; is a kind of metal, metallic element
CIDE DICTIONARY
Osmium, n. [Gr. 'osmh` a smell, odor, akin to 'o`zein to smell. So named in allusion to the strong chlorinelike odor of osmic tetroxide. See Odor.].
A rare metallic element of the platinum group with atomic number 76. It is 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 190.2. Specific gravity 22.477. [1913 Webster]
OXFORD DICTIONARY
Osmium, n. Chem. a hard bluish-white transition element, the heaviest known metal, occurring naturally in association with platinum and used in certain alloys.
Usage
Symb.: Os.
Etymology
Gk osme smell (from the pungent smell of its tetroxide)