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



BrE BrE//ˈkɒksɪks//
; NAmE NAmE//ˈkɑːksɪks//
(pl. coccyxes, coccyges
BrE BrE//ˈkɒksɪdʒiːz//
; NAmE NAmE//ˈkɑːksɪdʒiːz//
(anatomy) Skeleton and muscles
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the small bone at the bottom of the spine synonym tailbone See related entries: Skeleton and muscles Word Originlate 16th cent.: via Latin from Greek kokkux ‘cuckoo’ (because the shape of the human bone resembles the cuckoo's bill).
See the Oxford Advanced American Dictionary entry: coccyx