quatrefoil /katˈər-foil or katˈrə-foil/ or quatrefeuille /-fœ-ē or -fīl/

1. A four-petalled flower or leaf of four leaflets
2. An openwork design or ornament divided by cusps into four lobes (architecture)

• flügelhorn
• flügelhornist
• flügelhornists
• flügelhorns
• flügels
• fm
• FM
• Fm
• FMA
• FMCGs
• FMD
• FMS
• FMV
• f-number
• f-numbers
• fo.
• FO
• foal
• foaled
• foalfoot
• foalfoots
• foaling
• foals
• foam
• foam at the mouth