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(Anatomy) either of the two bones that form the sides of the pelvis, consisting of three fused components, the ilium, ischium, and pubis. Nontechnical name: hipbone
1. either of the two bones forming the sides of the pelvis, each consisting of three consolidated bones, the ilium, ischium, and pubis; innominate bone.
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|Noun||1.||innominate bone - large flaring bone forming one half of the pelvis; made up of the ilium and ischium and pubis|
acetabulum, cotyloid cavity - the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint