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

• psylla
• psyllas
• psyllid
• Psyllidae
• psyllids
• psyllid yellows
• psyllium
• psylliums
• psyop
• psywar
• pt
• PT
• Pt
• pta
• PTA
• ptarmic
• ptarmics
• ptarmigan
• ptarmigans
• PTE
• Pte
• pter-
• -ptera
• -pteran
• pteranodon