Search Result for "atomic number 72":
Wordnet 3.0

NOUN (1)

1. a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons;
[syn: hafnium, Hf, atomic number 72]



WordNet (r) 3.0 (2006):

atomic number 72
    n 1: a grey tetravalent metallic element that resembles
         zirconium chemically and is found in zirconium minerals;
         used in filaments for its ready emission of electrons [syn:
         hafnium, Hf, atomic number 72]