\Ca"per*cail`zie\, or Capercally \Ca"per*cal`ly\, n. [Gael, capulcoile.] (Zo["o]l.) A species of grouse ({Tetrao uragallus}) of large size and fine flavor, found in northern Europe and formerly in Scotland; -- called also {cock of the woods}. [Written also {capercaillie}, {capercaili}.]