Source : Webster's Revised Unabridged Dictionary (1913)

Whitetail \White"tail`\, n.
   1. (Zo["o]l.) The Virginia deer.

   2. (Zo["o]l.) The wheatear. [Prov. Eng.]

Source : WordNet®

whitetail
     n : common North American deer; tail has a white underside [syn:
          {Virginia deer}, {white tail}, {white-tailed deer}, {whitetail
         deer}, {Odocoileus Virginianus}]