Acetabulum

An example of a perforated acetabulum on an ornithischian dinosaur.

The acetabulum /æsᵻˈtæbjʊləm/ (cotyloid cavity) is a concave surface of the pelvis. The head of the femur meets with the pelvis at the acetabulum, forming the hip joint.

单词	Cotyloid cavity
释义	Cotyloid cavity 英语百科 Acetabulum The acetabulum /æsᵻˈtæbjʊləm/ (cotyloid cavity) is a concave surface of the pelvis. The head of the femur meets with the pelvis at the acetabulum, forming the hip joint.
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Cotyloid cavity

Acetabulum