acetabulum /a-si-tabˈū-ləm or -sē-/ (zoology)

1. The hollow that receives the head of the thigh bone
2. One of the cotyledons of the placenta of ruminants
3. The cavity that receives a leg in the body of insects
4. (in various invertebrates) a sucker

acetabˈūlar adjective

• unorthodoxy
• unossified
• unostentatious
• unostentatiously
• unostentatiousness
• unovercome
• unoverthrown
• unowed
• unowned
• unoxidised
• unoxidized
• unpaced
• unpacified
• unpack
• unpacked
• unpacker
• unpackers
• unpacking
• utu
• U-tube
• U-tubes
• U-turn
• U-turns
• utus
• UU