Saint-John's-wort
noun
variants
or Saint John's wort
or St. John's wort
1
: any of a large genus (Hypericum of the family Hypericaceae, the Saint-John's-wort family) of cosmopolitan herbs and shrubs with showy pentamerous yellow flowers
2
: the dried aerial parts of a Saint-John's-wort (Hypericum perforatum) that are held to relieve depression and are used in herbal remedies and dietary supplements
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Merriam-Webster unabridged
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