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English definition of “hackles”

hackles

noun [plural] uk   /ˈhæk.l̩z/ us  
the hairs on the back of some animals or the feathers on the back of the neck of some birds that rise when the animal or bird is frightened or about to fightThe skin, hair and bone of non-human animals
(Definition of hackles from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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