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)

• unicoloured
• unicorn
• unicorn-moth
• unicorns
• unicorn-shell
• unicorn-whale
• unicostate
• unicycle
• unicycles
• unidea'd
• unideal
• unidealism
• unidealisms
• unidealistic
• unidentifiable
• unidentified
• unidiomatic
• unidiomatically
• unidirectional
• UNIDO
• unifiable
• unific
• unification
• Unification Church
• unifications