œil-de-bœuf /œ-ē-də-bœfˈ/

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

• rhombic
• rhombohedra
• rhombohedral
• rhombohedron
• rhombohedrons
• rhomboi
• rhomboid
• rhomboidal
• rhomboidei
• rhomboides
• rhomboideus
• rhomboids
• rhombos
• rhombporphyries
• rhombporphyry
• rhombs
• rhombus
• rhombuses
• rhonchal
• rhonchi
• rhonchial
• rhonchus
• rhone
• rhones
• rhopalic