Dictionary.com
Thesaurus.com

quintefoil

American  
[kwint-foil] / ˈkwɪntˌfɔɪl /

noun

  1. cinquefoil.


Etymology

Origin of quintefoil

First recorded in 2005–10; from quinte- “five, fifth” (from French ) + -foil (as in trefoil ); quint 1 ( def. ), trefoil ( def. )