Definition of capercaillie noun from the Oxford Advanced Learner's Dictionary

 

capercaillie

 noun
noun
BrE BrE//ˌkæpəˈkeɪli//
 
; NAmE NAmE//ˌkæpərˈkeɪli//
 
Birds
 
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a large grouse (= a type of large bird) similar to a turkey, the male of which spreads out his tail feathers to attract females See related entries: Birds Word Origin mid 16th cent.: from Scottish Gaelic capull coille, literally ‘horse of the wood’.