Saint-john-s-wort definitions

jŏnz'wûrt', -wôrt'
Any of various herbs or shrubs of the genus Hypericum, having opposite leaves and yellow flowers with five petals and numerous stamens.
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A preparation made from one of these plants (H. perforatum), used in herbal medicine especially as an antidepressant.
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noun
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Any of various herbs or shrubs of the genus Hypericum, having opposite leaves and yellow flowers with five petals and numerous stamens.
noun
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A preparation made from one of these plants (H. perforatum), used in herbal medicine especially as an antidepressant.
noun
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Origin of saint-john-s-wort

From its being gathered on Saint John's Eve to ward off evil