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

• twatted
• twatting
• twattle
• twattled
• twattler
• twattlers
• twattles
• twattling
• twattlings
• tway
• threadfin
• threadfins
• threadier
• threadiest
• threadiness
• threadinesses
• threading
• thread-lace
• thread-laces
• threadlike
• threadmaker
• threadmakers
• thread mark
• thread marks
• Threadneedle Street