saint john's wort

noun

1. any of various plants or shrubs of the genus Hypericum, having yellow flowers and transparently dotted leaves.

noun usually abbreviated to: St John’s wort

1. 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 depressionSee also rose of Sharon (def. 1), tutsan