Acetabulum

**Semantic type:** Body Part, Organ, or Organ Component

**Definition:** Two cup shaped areas, one each on the lateral side of the lower pelvis that house the head of the femur to form the ball and socket joint of the hip.

**Synonyms:** - ACETABULUM - Bone structure of acetabulum (body structure) - acetabular part of hip bone - acetabular region - acetabulum