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2 definitions found
From: Webster's Revised Unabridged Dictionary (1913)
 cot·y·loid, cotyloidal a.  Anat. (a) Shaped like a cup; cup-shaped; as, the cotyloid cavity, the cup-shaped socket which receives the head of the thigh bone. (b) Pertaining to a cotyloid cavity; as, the cotyloid ligament, or notch.
 Syn: -- acetabular, cotyloid.
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From: WordNet (r) 2.0
 cotyloid cavity
      n : the cup-shaped hollow in the hipbone into which the head of
          the femur fits to form a ball-and-socket joint [syn: acetabulum]