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Added 10 October 2026

trefoil

/ˈtɹɛ.fɔɪl/ noun

In Latin: trifolium Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about trefoil at Wordnik → Where our words come from →

Any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves.
A plant of the genus Trifolium.
An architectural ornament in the form of three arcs arranged in a circle.

Origin

From Middle English trefoil, from Old French trifoil, trefeul, from Latin trifolium, from tri- (“three”) + folium (“leaf”).

From Wiktionary, via Kaikki.org (CC BY-SA)

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