DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   atomic number 21
       n 1: a white trivalent metallic element; sometimes classified in
            the rare earth group; occurs in the Scandinavian mineral
            thortveitite [syn: scandium, Sc, atomic number 21]