Английский разговорный словарь (основной) - acetabulum
Acetabulum
acetabulum
n. (pl. acetabula) Zool. 1 thesocketfor the head of the thigh-bone, or of the leg in insects. 2 a cup-shaped sucker of various organisms, including tapeworms andcuttlefish. [ME f. L, = vinegarcup f. acetum vinegar + -abulum dimin. of -abrum holder]