[cinque.foil] n [ME sink foil, fr. MF cincfoille, fr. L quinquefolium, fr. quinque five + folium leaf--more at blade] (14c) 1: any of a genus (Potentilla) of herbs and shrubs of the rose family with 5-lobed leaves and 5-petaled flowers--called also potentilla
2: a design enclosed by five joined foils