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

• pitmen
• pit-mirk
• piton
• pitons
• Pitot tube
• Pitot tubes
• pit-pat
• pit-pats
• pit-patted
• pit-patting
• pit ponies
• pit pony
• pitprop
• pitprops
• pits
• pit-saw
• pit-saws
• pit-sawyer
• pit-sawyers
• pit stop
• pit stops
• pitta
• Pitta
• pitta bread
• pittance