DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Duchy \Duch"y\ (d[u^]ch"[y^]), n.; pl. Duchies. [F. duch['e],
      OF. duch['e]e, (assumed) LL. ducitas, fr. L. dux. See
      Duke.]
      The territory or dominions of a duke; a dukedom.
      [1913 Webster]