osmium.
1. m. chemical element of no. atóm. 76 Metal in the Earth's crust, which is native in chrome, iron, copper and nickel ores. Bluish white, hard and little ductile, it has a high melting point and is the densest element. It is used in the manufacture of incandescent filaments and as a catalyst, and one of its derivatives is used as a fixative in histology. (Símb.) Os).
