Cotyloid \Cot"y*loid\ (k?t"?-loid), a. [Cotyle + -oid] (Anat.) (a) Shaped like a cup; as, the cotyloid cavity, which receives the head of the thigh bone. (b) Pertaining to a cotyloid cavity; as, the cotyloid ligament, or notch.
cotyloid adj : of the cup-shaped socket that receives the head of the thigh bone [syn: {acetabular}, {cotyloidal}]