Search Result for "atomic_number_57":
Wordnet 3.0

NOUN (1)

1. a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth;
[syn: lanthanum, La, atomic number 57]



WordNet (r) 3.0 (2006):

atomic number 57
    n 1: a white soft metallic element that tarnishes readily;
         occurs in rare earth minerals and is usually classified as
         a rare earth [syn: lanthanum, La, atomic number 57]