the cup- shaped hollow in the hipbone into which the head of the femur fits to form a ball- and- socket joint

A vinegar cup; socket of the hip bone; a measure of about one eighth of a pint, etc.

The bony cup which receives the head of the thigh bone.

The cavity in which the leg of an insect is inserted at its articulation with the body.

A sucker of the sepia or cuttlefish and related animals.

The large posterior sucker of the leeches.

A cavity in a bone for receiving the end of another bone; also a glandular substance found in the placenta of some animals.

In zool., applied to such organs as the cuplike sucking- discs on the arms of the cuttlefish; in anat., the socket of the hip- joint; plu. Acetabula.

The socket for the head of the femur, situated at the junction of the ilium, ischium, and pubis, all of which may or may not take part in its formation; in insects, the cavity of the thorax formed by the epimeron, sternum, and occasionally epigastrium, in which the legs are inserted; the large posterior sucker in leeches; one of the cotyledons of the ruminant placenta; the sucker on the arms of a Cephalopod.

The upper end of the femur and the acetabulum are affected with about equal frequency. – Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. by Alexander Miles Alexis Thomson

In rare cases the head is displaced upwards and lies immediately above the acetabulum. – Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. by Alexander Miles Alexis Thomson

The acetabulum is almost obliterated. – Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. by Alexander Miles Alexis Thomson

When the head of the femur penetrates the acetabulum, reduction should be attempted by traction and manipulation. – Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. by Alexander Miles Alexis Thomson

C. The acetabulum; c, the ligamentum teres. – Surgical Anatomy by Joseph Maclise

On the outer side of each hip bone is a deep cup, or socket, called the acetabulum, resembling an ancient vinegar cup, into which fits the rounded head of the thigh bone. – A Practical Physiology by Albert F. Blaisdell

When the rim of the acetabulum has been fractured, the patient must be confined to bed with extension for six to eight weeks, to avoid the risk of re- dislocation. – Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. by Alexander Miles Alexis Thomson