Trefoil Definition

trēfoil, trĕfoil
trefoils
noun
trefoils
Any of a number of plants with leaves divided into three leaflets, as the clover, tick trefoil, and certain species of lotus.
Webster's New World
A flower or leaf with three lobes.
Webster's New World
Any ornamental figure resembling a threefold leaf.
Webster's New World
Synonyms:

Other Word Forms of Trefoil

Noun

Singular:
trefoil
Plural:
trefoils

Origin of Trefoil

  • Middle English from Anglo-Norman trifoil from Latin trifolium tri- tri- folium leaf bhel-3 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Anglo-Norman trifoil < Old French trefeuil < Latin trifolium < tri- + folium (leaf).

    From Wiktionary

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