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The Collaborative International Dictionary
Acetabular

Acetabular \Ac`e*tab"u*lar\, a. Cup-shaped; saucer-shaped; acetabuliform. [1913 Webster] ||

Wiktionary
acetabular

a. 1 cup-shaped; saucer-shaped; acetabuliform 2 Related to the acetabulum

WordNet
acetabular

adj. of the cup-shaped socket that receives the head of the thigh bone [syn: cotyloid, cotyloidal]

Wikipedia