Search Result for "terbium metal":
Wordnet 3.0

NOUN (1)

1. a separate group of related lanthanides, including terbium, europium, gadolinium, and sometimes dysprosium; 



WordNet (r) 3.0 (2006):

terbium metal
    n 1: a separate group of related lanthanides, including terbium,
         europium, gadolinium, and sometimes dysprosium