the largest species of European grouse (Tetrao urogallus)
Origin of capercaillie; from Gaelic capull (; from Classical Latin caballus, horse) + coille, forest, hence literally , horse of the woods
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”).