acetabulum

Definition of Acetabulum in English :

1. acetabulum, cotyloid cavity

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

WordNet Lexical Database for English. Princeton University. 2010.

Acetabulum

noun plural -la (-lə)

1.

the deep cuplike cavity on the side of the hipbone that receives the head of the thighbone

2.

a round muscular sucker in flatworms, leeches, and cephalopod molluscs

3.

the aperture in the thorax of an insect that holds the leg

nounWord forms: plural ˌaceˈtabula (ˌæsəˈtæbjʊlə ; asˌətabˈyoolə) or ˌaceˈtabulums

1. Anatomy

the cup-shaped socket of the hipbone, into which the head of the thighbone fits

2. Zoology

a.

any suction disc of flukes, leeches, cephalopods, etc.

b.

the cavity into which an insect's leg fits

n. pl. ac·e·tab·u·la (-lə)

1. Anatomy The cup-shaped cavity at the base of the hipbone into which the ball-shaped head of the femur fits.

2. Zoology A cavity or socket in the body of an insect into which an appendage fits.

3. Zoology A cup-shaped structure, such as the sucker of a tapeworm or leech.