Webster’s Revised Unabridged Dictionary · 1913
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.