œil-de-bœuf /œ-ē-də-bœfˈ/

1. A small round window
2. An octagonal vestibule at the court of Versailles, hence one elsewhere

• decanal
• Decandria
• decandrian
• decandrous
• decane
• decanes
• decani
• decant
• decantate
• decantated
• decantates
• decantating
• decantation
• decantations
• decanted
• decanter
• decanters
• decanting
• decants
• decapitalisation
• decapitalise
• decapitalised
• decapitalises
• decapitalising
• decapitalization