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WordReference Random House Learner's Dictionary of American English © 2024tre•foil /ˈtrifɔɪl, ˈtrɛfɔɪl/USA pronunciation n. [countable]- Plant Biologya plant having three small leaflets resembling those of clover.
- any figure, design, or emblem resembling a clover leaf.
WordReference Random House Unabridged Dictionary of American English © 2024tre•foil (trē′foil, tref′oil),USA pronunciation n. - any of numerous plants belonging to the genus Trifolium, of the legume family, having usually digitate leaves of three leaflets and reddish, purple, yellow, or white flower heads, comprising the common clovers.
- any of various similar plants.
- Architecturean ornament composed of three lobes, divided by cusps, radiating from a common center.
- such an ornamental figure used by the Girl Scouts as its official emblem.
adj. - of, pertaining to, or shaped like a trefoil.
- Latin trifolium triple leaf, the three-leaved plant, clover, equivalent. to tri- tri- + folium leaf
- Anglo-French trifoil
- Middle English 1350–1400
Collins Concise English Dictionary © HarperCollins Publishers:: trefoil /ˈtrɛfɔɪl/ n - any of numerous leguminous plants of the temperate genus Trifolium, having leaves divided into three leaflets and dense heads of small white, yellow, red, or purple flowers
- any of various related plants having leaves divided into three leaflets, such as bird's-foot trefoil
- a leaf having three leaflets
- an ornament in the form of three arcs arranged in a circle
Etymology: 14th Century: from Anglo-French trifoil, from Latin trifolium three-leaved herb, from tri- + folium leafˈtrefoiled adj |