DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   atomic number 41
       n 1: a soft grey ductile metallic element used in alloys; occurs
            in niobite; formerly called columbium [syn: niobium,
            Nb, atomic number 41]