Source : Webster's Revised Unabridged Dictionary (1913)

Blackcock \Black"cock`\, n. (Zo["o]l.)
   The male of the European black grouse ({Tetrao tetrix},
   Linn.); -- so called by sportsmen. The female is called gray
   hen. See {Heath grouse}.

Source : WordNet®

blackcock
     n : male black grouse [syn: {black cock}]