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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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]