Answer: quatrefoils

AnswerCrossword Clue
QUATREFOILSArchitectural ornaments.
quatrefoilsQUATREFOIL, a four-petalled flower or leaf of four leaflets; an openwork design or ornament divided by cusps into four lobes also QUATREFEUILLE
quatrefoilsAn ornamental design of four lobes or leaves as used in architectural tracery, resembling a flower or four-leaf clover