acetabulum /ˌasɪˈtabjʊləm/

a

I. noun

1.
[Anatomy] the socket of the hip bone, into which the head of the femur fits.
2.
[Zoology] any cup-shaped structure, especially a sucker.
II. derivatives

acetabular
adjective


– origin late Middle English (denoting a vinegar cup, hence a cup-shaped cavity): from Latin, from acetum ‘vinegar’ + -abulum, denoting a container.

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