English dictionary

acetabulum

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Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint

noun.body

Synonyms cotyloid cavity

Source: WordNet 3.0
A vinegar cup; socket of the hip bone; a measure of about one eighth of a pint, etc.

noun

Source: webster1913