acetabulum

American  

[as-i-tab-yuh-luhm] / ˌæs ɪˈtæb yə ləm /

noun

plural

acetabula

1. Anatomy. the socket in the hipbone that receives the head of the thighbone.

2. Zoology. any of the suction appendages of a leech, octopus, etc.

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acetabulum British  

/ ˌæsɪˈtæbjʊləm /

noun

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

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Other Word Forms

• acetabular adjective
• postacetabular adjective
• preacetabular adjective
• subacetabular adjective

Etymology

Origin of acetabulum

1660–70; < Latin: hip socket, cup-shaped part of a plant (Pliny), literally, small cup, originally for vinegar, equivalent to acēt ( um ) vinegar + -ā- by analogy with verbal derivatives ( vocable ) + -bulum suffix denoting instrument or vessel

Example Sentences

McCarthy’s voluminous research is everywhere on the page — and, yes, very impressive — but you may find yourself stopping to look up supercavitation, acetabulum or festination only to turn back having forgotten what’s happening.

From Washington Post • Nov. 15, 2021

The head of the femur becomes abnormally shaped and no longer fits seamlessly in the acetabulum, or socket, putting the hip at risk of future injury.

From Washington Post • May 15, 2017

The hip joint is the articulation between the head of the femur and the acetabulum of the hip bone.

From Textbooks • Jun. 19, 2013

The hip joint is formed by the articulation between the acetabulum of the hip bone and the head of the femur.

From Textbooks • Jun. 19, 2013

As a result of the pressure of the carious articular surfaces against one another, the acetabulum is enlarged and the upper end of the femur is drawn gradually upwards and backwards within the socket.

From Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition. by Miles, Alexander