1. the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint; [syn: acetabulum, cotyloid cavity]
WordNet (r) 3.0 (2006):
cotyloid cavity
n 1: the cup-shaped hollow in the hipbone into which the head of
the femur fits to form a ball-and-socket joint [syn:
acetabulum, cotyloid cavity]