œil-de-bœuf /œ-ē-də-bœfˈ/

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

• spring-cleaning
• spring-cleans
• spring clip
• spring clips
• springe
• springed
• springer
• stem cell
• stem cells
• stem cup
• stem cups
• steme
• stemed
• stemes
• stem form
• stem forms
• stem ginger
• stem gingers
• steming
• stemless
• stemlet
• stemlets
• stemma
• stemmata
• stemmatous