Found 2 items, similar to osmium.
English → English (WordNet) Definition: osmium 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]
English → English (gcide) Definition: osmium osmium \os"mi*um\ ([o^]z"m[i^]*[u^]m), 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.] (Chem.) 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 +PJC]