trefoil

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves
noun a plant of the genus Trifolium
noun an architectural ornament in the form of three arcs arranged in a circle

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

Trefoil is short for threefold. — The Wouldbegoods: Being the Further Adventures of the Treasure Seekers, E. (Edith) Nesbit
Of the trefoil, or clover, there is but little cultivated. — A New Guide for Emigrants to the West, John Mason Peck
I wonder if a pill of holy trefoil would dispel this fascination. — The Journal of Sir Walter Scott: From the Original Manuscript at Abbotsford, Walter Scott

medic, medick

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