any of several plants belonging to the genus Potentilla, of the rose family, having yellow, red, or white five-petaled flowers, as P. reptans (creeping cinquefoil) of the Old World, or P. argentea (silvery cinquefoil) of North America.
2. Also called quinquefoil, quintefoil. Architecture.
a panellike ornament consisting of five lobes, divided by cusps, radiating from a common center.
Heraldry. a charge in the form of a five-leaved clover.
1375–1425; late Middle English sink foil < Middle French cincfoille < Latin quīnque folia five leaves, translation of Greek pentáphyllon