n.
Pronunciation: ' tr ē - ˌ fo ̇ i(- ə )l, ' tre-
Function: noun
Etymology: Middle English, from Anglo-French, from Latin trifolium, from tri- + folium leaf ― more at BLADE
Date: 15th century
1 a : CLOVER 1 broadly : any of several leguminous herbs (as bird's-foot trefoil) with leaves that have or appear to have three leaflets b : a trifoliolate leaf
2 : an ornament or symbol in the form of a stylized trifoliolate leaf
trefoil