Medical Dictionary

acetabulum ac·e·tab·u·lum (ās'ĭ-tāb'yə-ləm)
n. pl. ac·e·tab·u·la (-lə)
The cup-shaped cavity at the base of the hipbone into which the ball-shaped head of the femur fits. Also called cotyloid cavity.

ac'e·tab'u·lar adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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