acetabulum

ac·e·tab·u·lum

noun \-ˈtab-yə-ləm\

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

Definition of ACETABULUM

1

: the cup-shaped socket in the hip bone

2

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

—ac·e·tab·u·lar \-lər\ adjective

Illustration of ACETABULUM