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]