St John's wort
A flowering plant, Hypericum perforatum, also known as Perforate St John's wort, that has long been believed to have medicinal qualities. There is, in fact, some evidence that St John's wort may possibly be useful in diminishing depression. K Linde and coworkers reviewed 23 published reported trials, including one of 1757 patients, indicating that extracts of St John's wort are more effective than placebo for the treatment of mild to moderately severe depression (British Medical Journal 313:253-8, 1996). Sun sensitivity, fatigue, stomach upset, and allergic reactions are among the side effects that have been reported in people taking St John's wort. The powers of this venerable herb were reputed to derive from John the Baptist; red spots on its leaves were said to appear on August 29, the anniversary of his death, representing the blood spilt when St John was beheaded. Others hold that the herb is named for the Knights of St John who used it to treat the wounded in the Crusades.

Medical dictionary. 2011.

Look at other dictionaries:

  • St John's wort — ► NOUN ▪ a herbaceous plant or shrub with yellow flowers and paired oval leaves. ORIGIN so named because some species come into flower near the feast day of St John the Baptist (24 June) …   English terms dictionary

  • St John's wort — Hypericum perforatum St John s wort Scientific classification Kingdom: Plantae (unranked) …   Wikipedia

  • St John's wort — n. any yellow flowered plant of the genus Hypericum, esp. H. androsaemum. * * * noun any of numerous plants of the genus Hypericum having yellow flowers and transparently dotted leaves; traditionally gathered on St John s eve to ward off evil •… …   Useful english dictionary

  • St.-John's-wort — /saynt jonz werrt , wawrt /, n. any of various plants or shrubs of the genus Hypericum, having yellow flowers and transparently dotted leaves. [1745 55; so named because gathered on St. John s Eve to ward off evil] * * * St. John s wort «saynt… …   Useful english dictionary

  • St John's-wort — Hypericum Hy*per i*cum, n. [L., fr. Gr. ?, ?; ? under, among + ?, ?, heath, heather.] (Bot.) A genus of plants, generally with dotted leaves and yellow flowers; called also {St. John s wort}. [1913 Webster] …   The Collaborative International Dictionary of English

  • St. John's-wort — paprastoji jonažolė statusas T sritis vardynas apibrėžtis Jonažolinių šeimos vaistinis nuodingas augalas (Hypericum perforatum), paplitęs šiaurės Afrikoje, Europoje ir Azijoje. Iš jo gaunamas eterinis aliejus. atitikmenys: lot. Hypericum… …   Lithuanian dictionary (lietuvių žodynas)

  • St.-John's-wort — /saynt jonz werrt , wawrt /, n. any of various plants or shrubs of the genus Hypericum, having yellow flowers and transparently dotted leaves. [1745 55; so named because gathered on St. John s Eve to ward off evil] * * * …   Universalium

  • St. John's wort — (also St. Johns wort) n. a herbaceous plant or shrub with distinctive yellow five petaled flowers and paired oval leaves, used in medicinal preparations to treat various disorders, including depression. ● Genus Hypericum, family Guttiferae: many… …   Useful english dictionary

  • St John's wort — noun a herbaceous plant or shrub with distinctive yellow five petalled flowers and paired oval leaves. [Genus Hypericum: many species.] Origin so named because some species come into flower near the feast day of St John the Baptist (24 June) …   English new terms dictionary

  • St. John's wort — (sānt jonz wort) [NF] any of various species of the genus Hypericum; H. perforatum is the medicinal herb, which is used as a mild antidepressant, sedative, and anxiolytic; it is also used topically for inflammation of the skin, contusions,… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”