Source : Webster's Revised Unabridged Dictionary (1913)

Roebuck \Roe"buck`\, n. [1st roe + buck.] (Zo["o]l.)
   A small European and Asiatic deer ({Capreolus capr[ae]a})
   having erect, cylindrical, branched antlers, forked at the
   summit. This, the smallest European deer, is very nimble and
   graceful. It always prefers a mountainous country, or high
   grounds.

Source : WordNet®

roebuck
     n : male roe deer