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The Collaborative International Dictionary
Trifoly

Trifoly \Tri"fo*ly\, n. [L. trifolium. See Trifoliate, Trefoil.] (Bot.) Sweet trefoil. [Obs.]

She was crowned with a chaplet of trifoly.
--B. Jonson.

Wiktionary
trifoly

n. (context obsolete English) melilot; sweet clover

WordNet