'osmium' definitions:

Definition of 'osmium'

From: WordNet
noun
A hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known [syn: osmium, Os, atomic number 76]

Definition of 'osmium'

From: Elements
  • Symbol: Os
  • Atomic number: 76
  • Atomic weight: 190.2
  • Hard blue-white metallic transition element. Found with platinum and used in some alloys with platinum and iridium.