Trefoils are a set of three-lobed leaves or flowers that are commonly found in plants such as clovers, shamrocks, and buttercups. These triads of foliage can be referred to by various synonyms, including trilobes, trifoliate, three-leafed, or ternate. In botanical terminology, the word trefoil is often used to describe the clover plant family, which includes species such as Trifolium repens and Trifolium pratense. Other common names for trefoils include three-leaved clover, three-leaved grass, trefoil-leaf, and shamrock. These three-parted leaves have been a symbol of good luck and fortune throughout history, and their intricate design has been used in various cultures and iconography.