Quatrefoil Definition
 kătər-foil, kătrə- 
    noun
  
 A flower with four petals or a leaf with four leaflets.
 Webster's New World 
Tracery or an ornament with four foils or lobes.
 American Heritage 
A circular design made up of four converging arcs.
 Webster's New World 
(architecture) A symmetrical shape which forms the overall outline of four partially-overlapping circles of the same diameter.
 Wiktionary 
Other Word Forms of Quatrefoil
Noun
Singular:
 quatrefoilPlural:
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