Source : Webster's Revised Unabridged Dictionary (1913)

Fallow deer \Fal"low deer`\ [So called from its fallow or pale
   yellow color.] (Zo["o]l.)
   A European species of deer ({Cervus dama}), much smaller than
   the red deer. In summer both sexes are spotted with white. It
   is common in England, where it is often domesticated in the
   parks.

Source : WordNet®

fallow deer
     n : small Eurasian deer [syn: {Dama dama}]