DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Smew \Smew\, n. [Perhaps for ice-mew.] (Zool.)
      (a) small European merganser (Mergus albellus) which has a
          white crest; -- called also smee, smee duck, white
    merganser, and white nun.
      (b) The hooded merganser. [Local, U.S.]
          [1913 Webster]