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cap·er·cail·lie(kăp′ər-kāl′yē, -kā′lē) also cap·er·cail·zie (-kāl′zē)
A large grouse (Tetrao urogallus), native to northern Europe and having dark plumage and a fanlike tail. Also called wood grouse.
[Scottish Gaelic capull coille, literally, "horse of the forest," (in reference to its relatively large size) : capull, horse (from Middle Irish capall, from Old Irish, ultimately from Latin caballus; see cavalier) + coille, genitive of coille, forest (from Middle Irish (perhaps influenced by Middle Irish caílle, a kind of land division), from Old Irish).]
(Animals) a large European woodland grouse, Tetrao urogallus, having a black plumage and fan-shaped tail in the male
[C16: from Scottish Gaelic capull coille horse of the woods]
cap•er•cail•lie(ˌkæp ərˈkeɪl yi)
also cap•er•cail•zie(-ˈkeɪl zi)
a large grouse, Tetrao urogallus, of Eurasian forests.
[1530–40; by dissimilation < Scottish Gaelic capull coille, literally, horse of the woods]