Definition of trefoil

The word "trefoil" has its roots in Latin and Old French. The Latin term "trifolium" referred to a leaf with three lobes, which was also the shape of the three-leafed flower known as clover. The Old French term "tréfoil" evolved from "trifolium" and was used to describe a three-leafed clover or a decorative ornament with three leaves. The term was later adopted into Middle English as "trefoil", referring to both the flower and the ornament. In heraldry, a trefoil is a symbol of the Holy Trinity and is often depicted in coats of arms and other decorative designs. Throughout history, the term "trefoil" has maintained its association with the three-leafed flower and its connection to sacred and symbolic meanings.