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St. John's wort

American  
[seynt-jonz wurt, wawrt] / ˌseɪntˈdʒɒnz ˌwɜrt, ˌwɔrt /
St. John's Wort,

noun

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


Etymology

Origin of St. John's wort

First recorded in 1745–55; so named because it was traditionally gathered on St. John's Eve to ward off evil

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A solitary figure who preferred working alone and needed large doses of St. John’s wort to get through days when his studio buzzed with people.

From Los Angeles Times • Sep. 4, 2025

St. John’s wort can also interact with many other medicines to reduce their effectiveness.

From Seattle Times • Dec. 29, 2021

Ingredient apps like Think Dirty help aficionados weigh the difference between mugwort and St. John’s wort.

From The Wall Street Journal • Aug. 9, 2018

The first one I drank was tangerine and black currant juice dosed with rhodiola, St. John’s wort and albizia, which some believe fight anxiety and depression.

From New York Times • Jul. 3, 2017

The ubiquitous dandelion is likewise golden; then we have birdsfoot trefoil, ragwort, agrimony, silver-weed, celandine, tormentil, yellow iris, St. John's wort, and a host of other flowers of the same hue.

From A Cotswold Village by Gibbs, J. Arthur

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