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  1. sacrum

    • IPA[ˈseɪkrəm]

    英式

    • n.
      a triangular bone in the lower back formed from fused vertebrae and situated between the two hip bones of the pelvis.
    • noun: sacrum, plural noun: sacra

    • 更多解釋
    • IPA[ˈsakrəm]

    美式

    • n.
      a triangular bone in the lower back formed from fused vertebrae and situated between the two ...

    Oxford American Dictionary