[qua.tre.foil] n [ME quaterfoil set of four leaves, fr. MF quatre + ME -foil (as in trefoil)] (15c) 1: a conventionalized representation of a flower with four petals or of a leaf with four leaflets
2: a 4-lobed foliation in architecture
[qua.tre.foil] n [ME quaterfoil set of four leaves, fr. MF quatre + ME -foil (as in trefoil)] (15c) 1: a conventionalized representation of a flower with four petals or of a leaf with four leaflets
2: a 4-lobed foliation in architecture
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012