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

Acetabulum n. : The bony cup which receives the head of the thigh bone.

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

Acetabulum n. : A sucker of the sepia or cuttlefish and related animals.

Acetabulum n. : The large posterior sucker of the leeches.

Acetabulum n. : One of the lobes of the placenta in ruminating animals.

Example:
I'm writing a poem for my friend who is recovering from hip replacement surgery. What rhymes with Acetabulum?

Taxonomy
acetabulum, pelvis, hip bone, hip-joint, free encyclopedia, Bones, vessel, hip joint, two-fifths, The rest, three bones, Female Pelvis, search, anatomical region, Ancient Roman, cup, unit of measure, Pelvic girdle.

Defination from the web:
acetabulum is the acetabular notch, which is continuous with a circular depression, the acetabular fossa, at the bottom ... The rest of the acetabulum is formed by a curved, crescent-moon shaped surface, the lunate surface, where the joint is made with the ...