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)

• custocks
• custode
• custodes
• custodial
• custodian
• custodians
• custodianship
• custodianships
• custodier
• custodiers
• custodies
• custody
• custom
• customable
• customaries
• customarily
• customariness
• customarinesses
• customary
• custom-built
• customed
• customer
• customers
• custom house
• custom houses