1. 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]
WordNet (r) 3.0 (2006):
atomic number 76
n 1: 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]