Trefoil
noun
1.
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.
2.
any of various similar plants.
3.
Architecture. an ornament composed of three lobes, divided by cusps, radiating from a common center.
4.
such an ornamental figure used by the Girl Scouts as its official emblem.
adjective
5.
of, relating to, or shaped like a trefoil.
noun
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
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