Having the shape or form of a cotyla; cup-shaped or socket-shaped, especially describing anatomical structures.
From cotyla + -oid (resembling). Cotyloid is used specifically in anatomy to describe the cup-shaped socket of the hip joint and similar structures.
The hip socket is officially called the acetabulum, but anatomists also call it the cotyloid cavity—so one body structure has multiple names depending on whether you're thinking of it as a vinegar cup or a Greek cup, both perfect descriptions.
Complete word intelligence in one call. Free tier — 50 lookups/day.