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

• up to the hilt
• up to the knocker
• up to the mark
• up to the minute
• up-to-the-minute
• up-to-the-moment
• up to time
• up to tricks
• up town
• uptown
• uptowner
• uptowners
• uptowns
• up-train
• uptrain
• uptrained
• uptraining
• up-trains
• uptrains
• uptrend
• uptrends
• uptrilled
• upturn
• upturned
• upturning