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



BrE BrE//ˈseɪkrəm//
; NAmE NAmE//ˈseɪkrəm//
; BrE BrE//ˈsækrəm//
; NAmE NAmE//ˈsækrəm//
(pl. sacra
BrE BrE//ˈseɪkrə//
; NAmE NAmE//ˈseɪkrə//
, sacrums)
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a bone in the lower back, between the two hip bones of the pelvis Word Originmid 18th cent.: from Latin os sacrum, translation of Greek hieron osteon ‘sacred bone’ (from the belief that the soul resides in it).
See the Oxford Advanced American Dictionary entry: sacrum