nounpl. -·la or -·lums
- Anat. the cup-shaped socket of the hipbone, into which the head of the thighbone fits
- any suction disc of flukes, leeches, cephalopods, etc.
- the cavity into which an insect's leg fits
Origin of acetabulumL, origin, originally , vinegar cup from acetum (see aceto-) + -abulum, diminutive of -abrum, receptacle
- Anatomy The cup-shaped cavity at the base of the hipbone into which the ball-shaped head of the femur fits.
- Zoology A cavity or socket in the body of an insect into which an appendage fits.
- Zoology A cup-shaped structure, such as the sucker of a tapeworm or leech.
Origin of acetabulumLatin acētābulum vinegar cup from acētum vinegar ; see acetum .
(plural acetabula or acetabulums)
- (Roman Antiquities) a vinegar cup;
- (Roman Antiquities) the socket of the hipbone;
- (Roman Antiquities) a measure of about one eighth of a pint
- (anatomy) The bony cup which receives the head of the thigh bone.
- (anatomy) The cavity in which the leg of an insect is inserted at its articulation with the body.
- (anatomy) A sucker of the sepia or cuttlefish and related animals.
- (anatomy) The large posterior sucker of the leeches.
- (anatomy) One of the lobes of the placenta in ruminating animals.