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Coxal bone

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noun, plural: coxal bones


The lateral half of the large, flattened, irregularly shaped bone of the pelvis consisting of ilium, ischium and pubis that have fused in the adult, and the acetabulum, which is the point at which the three bones meet.


It has one of the few ball and socket synovial joints in the body, the hip joint. It forms the pelvis together with the sacrum and coccyx.

Word origin: coxal < Latin coxa, hip.

Synonym: os coxa, innominate bone, hip bone.