Cupped; cup-like: in anatomy, specifically applied to the acetabulum or socket of the thigh-bone; acetabular: in entomology, applied to the cavity in which the coxa or basal joint of the leg is inserted.Pertaining to or connected with a cotyle.n. In entomology, one of the coxal cavities or hollows in the lower surface of the thorax in which the coxæ are articulated. Also called acetabulum.