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Definition of st john's wort

st john's wort

Plural:St John's worts
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• noun

1

An herbal extract or dietary supplement prepared from the dried flowers and leaves of Hypericum perforatum, commonly used in traditional and alternative medicine to treat mild to moderate depression.

Example

"Patients should consult a pharmacist before taking St John's wort, as the supplement interacts with many prescription medications."

2

Any of various perennial herbs or shrubs of the genus Hypericum (family Hypericaceae), especially Hypericum perforatum, native to Europe and Asia, characterized by opposite leaves with translucent oil glands and clusters of bright, five-petaled yellow flowers.

Example

"Clusters of wild St John's wort bloomed with bright yellow flowers along the sunny roadside."

Synonyms
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• Nearby Words

sri lankan pit viper
sriracha
st croix
st john's wort
st johns
st lawrence river
st paul

Cite this Entry

Wordmom. (2026). Definition of St john's wort. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/st-john's-wort
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