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)

• megalosaur
• megalosauri
• megalosaurian
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• megalosaurus
• megalosauruses
• megamega-
• mega-merger
• mega-mergers
• meganewton
• meganewtons
• megaparsec
• megaparsecs
• megaphone
• megaphoned
• megaphone diplomacy
• megaphones
• megaphonic
• megaphoning
• megapixel
• megapixels
• megapode
• megapodes
• megara
• megarad