The Collaborative International Dictionary of English v.0.48:
Acetabular \Ac`e*tab"u*lar\, a. Cup-shaped; saucer-shaped; acetabuliform. [1913 Webster]WordNet (r) 3.0 (2006):
acetabular adj 1: of the cup-shaped socket that receives the head of the thigh bone [syn: acetabular, cotyloid, cotyloidal]