DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   atomic number 1
       n 1: a nonmetallic univalent element that is normally a
            colorless and odorless highly flammable diatomic gas; the
            simplest and lightest and most abundant element in the
            universe [syn: hydrogen, H, atomic number 1]