a. Anat. [ad. Gr. κοτυλοειδής cup-shaped: see COTYLE and -OID.]
Shaped like a cup: applied esp. to the socket or acetabulum of the hip-joint (c. cavity), and to parts in connection with this; also to the coxal cavity in insects (cf. COTYLE 2).
1760. White, in Phil. Trans., LI. 678. The cotyloid cavity greatly diminished in size.
1826. Kirby & Sp., Entomol. (1828), III. xxxiv. 428. A corresponding deep socket (or cotyloid cavity).
1840. G. Ellis, Anat., 682. The synovial membrane … covers the acetabulum, being continued … over the surfaces of the cotyloid ligament.
