Source : Webster's Revised Unabridged Dictionary (1913)

Ousel \Ou"sel\, n. [OE. osel, AS. ?sle; akin to G. amsel, OHG.
   amsala, and perh. to L. merula blackbird. Cf. {Merle},
   {Amsel}.] (Zo["o]l.)
   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}.]

   {Rock ousel} (Zo["o]l.), the ring ousel.

   {Water ousel} (Zo["o]l.), the European dipper ({Cinclus
      aquaticus}), and the American dipper ({C. Mexicanus}).