|1.||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|
|2.||any of various related plants having leaves divided into three leaflets, such as bird's-foot trefoil|
|3.||a leaf having three leaflets|
|4.||architect an ornament in the form of three arcs arranged in a circle|
|[C14: from Anglo-French trifoil, from Latin trifolium three-leaved herb, from |
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