acetabulum

noun ac·e·tab·u·lum \-ˈta-byə-ləm\

plural ac·e·tab·u·lums or ac·e·tab·u·la\-lə\

Definition of ACETABULUM

: a ventral sucker of a trematode

: the cup-shaped socket in the hipbone

— ac·e·tab·u·lar \-lər\ adjective

Latin, literally, vinegar cup, from acetum vinegar

First Known Use: 1661

Medical Dictionary

noun ac·e·tab·u·lum \-ˈtab-yə-ləm\

plural ac·e·tab·u·lums or ac·e·tab·u·la \-lə\

: the cup-shaped socket in the hip bone

: a sucker of an invertebrate (as a trematode or leech)

—ac·e·tab·u·lar \-lər\ adjective

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