trefoil
Word family adjectivetrefoilednountrefoil
tre·foil /ˈtriːfɔɪl, ˈtrefɔɪl/ noun [countableC] technical 1. HBPa type of small plant that has leaves which divide into three parts 三叶植物 2. CFa pattern in the shape of these leaves 三叶形 Origin trefoil (1300-1400) Old French trefeuil, from Latin trifolium, from tri- “three” + folium “leaf”