The Collaborative International Dictionary of English v.0.48:

Ousel \Ou"sel\ ([oo^]"z'l), n. [OE. osel, AS. [=o]sle; akin to
   G. amsel, OHG. amsala, and perh. to L. merula blackbird. Cf.
   Merle, Amsel.] (Zool.)
   One of several species of European thrushes, especially the
   blackbird (Merula merula, or Turdus merula), and the
   mountain or ring ousel (Turdus torquatus). [Written also
   ouzel.]
   [1913 Webster]

   Rock ousel (Zool.), the ring ousel.

   Water ousel (Zool.), the European dipper (Cinclus
      aquaticus), and the American dipper (Cinclus
      Mexicanus).
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Water ousel \Wa"ter ou"sel\, Water ouzel \Wa"ter ou"zel\ .
   (Zool.)
   Any one of several species of small insessorial birds of the
   genus Cinclus (or Hydrobates), especially the European
   water ousel (Cinclus aquaticus), and the American water
   ousel (Cinclus Mexicanus). These birds live about the
   water, and are in the habit of walking on the bottom of
   streams beneath the water in search of food.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dipper \Dip"per\, n.
   1. One who, or that which, dips; especially, a vessel used to
      dip water or other liquid; a ladle.
      [1913 Webster]

   2. (Zool.)
      (a) A small grebe; the dabchick.
      (b) The buffel duck.
      (c) The water ouzel (Cinolus aquaticus) of Europe.
      (d) The American dipper or ouzel (Cinclus Mexicanus).
          [1913 Webster]

   The Dipper (Astron.), the seven principal stars in the
      constellation of the Great Bear; popularly so called from
      their arrangement in the form of a dipper; -- called also
      Charles's Wain. See Ursa Major, under Ursa.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cinclus \Cinclus\ n.
   the type genus of the bird family Cinclidae. It includes
   the water ouzels Cinclus aquaticus of Europe and Cinclus
   mexicanus of western North America.

   Syn: genus Cinclus.
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

Cinclus mexicanus
    n 1: a water ouzel of western North America [syn: American
         water ouzel, Cinclus mexicanus]