1. a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel; [syn: molybdenum, Mo, atomic number 42]
WordNet (r) 3.0 (2006):
atomic number 42
n 1: a polyvalent metallic element that resembles chromium and
tungsten in its properties; used to strengthen and harden
steel [syn: molybdenum, Mo, atomic number 42]