English Dictionary

Definition of “Saint John's wort”

Saint John's wort

Definitions

noun

usually abbreviated to: St John's wort
    1. any of numerous shrubs or herbaceous plants of the temperate genus Hypericum, such as H. perforatum, having yellow flowers and glandular leaves: family Hypericaceae
    2. a preparation of this plant often used to treat mild depression See also rose of Sharon (sense 1), tutsan

Word Origin

C15: so named because it was traditionally gathered on Saint John's Eve (June 23) as a protection against evil spirits

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