Search Result for "amphibole group":
Wordnet 3.0

NOUN (1)

1. a group of minerals with similar crystal structures containing a silicate chain and combinations of chiefly sodium and calcium and magnesium and iron and aluminum; 



WordNet (r) 3.0 (2006):

amphibole group
    n 1: a group of minerals with similar crystal structures
         containing a silicate chain and combinations of chiefly
         sodium and calcium and magnesium and iron and aluminum