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

• milkweed butterfly
• milkweeds
• milk-white
• milkwood
• milkwoods
• milkwort
• milkworts
• milky
• Milky Way
• mill
• millable
• millboard
• millboards
• milldam
• milldams
• mille
• milled
• millefeuille
• millefeuilles
• millefiori
• millefiori glass
• mille fleurs
• millefleurs
• millenarian
• millenarianism