the largest species of European grouse (Tetrao urogallus)
Origin of capercaillie; from Gaelic capull coille, literally , horse of the woods ; from capull, horse (; from Classical Latin caballus: see cavalier) + coille, forest
A large grouse (Tetrao urogallus), native to northern Europe and having dark plumage and a fanlike tail. Also called wood grouse.
Origin of capercaillieScottish Gaelic capull coille : capull, horse (from Middle Irish capall, from Old Irish, ultimately from Latin caballus, of Celtic origin) + coille, genitive of coille, forest (from Old Irish caill).
A Scots corruption of Scottish Gaelic capull coille (“horse of the woods”).