| cotyloid | of the cup-shaped socket that receives the head of the thigh bone |
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| cotyloid | the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint |
| cotyloid | a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone |
| cotyloid | of the cup-shaped socket that receives the head of the thigh bone |