smew /ˈsmju/
  巫鷗
  Smew n.  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.]
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  smew
       n : smallest merganser and most expert diver; found in northern
           Eurasia [syn: Mergus albellus]