cotyloid cavity

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint
• Syn:
acetabulum
• Derivationally related forms:
acetabular (for: acetabulum)
• Hypernyms:
socket
• Part Holonyms:
hipbone, innominate bone