Search Result for "atomic number 68":
Wordnet 3.0

NOUN (1)

1. a trivalent metallic element of the rare earth group; occurs with yttrium;
[syn: erbium, Er, atomic number 68]



WordNet (r) 3.0 (2006):

atomic number 68
    n 1: a trivalent metallic element of the rare earth group;
         occurs with yttrium [syn: erbium, Er, atomic number
         68]