Saint John's wort


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Saint John's wort

also Saint John's·wort  (jŏnz′wûrt′, -wôrt′)
n.
1. Any of various herbs or shrubs of the genus Hypericum, having opposite leaves and yellow flowers with five petals and numerous stamens. Also called hypericum.
2. A preparation made from one of these plants (H. perforatum), used in herbal medicine especially as an antidepressant.

[From its being gathered on Saint John's Eve to ward off evil.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Saint John's wort

n
(Plants)
a. any of numerous shrubs or herbaceous plants of the temperate genus Hypericum, such as H. perforatum, having yellow flowers and glandular leaves: family Hypericaceae
b. a preparation of this plant often used to treat mild depression. See also rose of Sharon1, tutsan
[C15: so named because it was traditionally gathered on Saint John's Eve (June 23) as a protection against evil spirits]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Translations

Saint John's wort

n (Bot) → erba di San Giovanni
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
For instance, we have seen the use of Saint John's Wort (a flowering plant of Hypericaceae family).
To make Saint John's wort oil, grind fresh Saint John's wort flowers and leaves into a mash and add 1 part of this fresh herb mash to 3 parts olive oil.
Acute heart transplant rejection due to Saint John's wort. Lancet 2000;355:548-9.