Skip to search.
Reference
Dictionary
Encyclopedia
Thesaurus
World Factbook

 
Search Dictionary:

Houghton Mifflin

os·mi·um  audio  (zm-m) KEY 

NOUN:
Symbol Os
A bluish-white, hard metallic element, found in small amounts in osmiridium, nickel, and platinum ores. It is used as a platinum hardener and in making pen points, phonograph needles, and instrument pivots. Atomic number 76; atomic weight 190.2; melting point 3,000°C; boiling point 5,000°C; specific gravity 22.57; valence 2, 3, 4, 8. See Table at element.

ETYMOLOGY:
From Greek osm, smell (from the strong odor of osmium tetroxide)


Visit our partner's site
Provided by Houghton Mifflin
logoeReference -- Download this interactive reference software to your desktop computer