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Saint John's wort

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

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Word Origin for Saint John's wort

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 & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Medical definitions for Saint John's wort

Saint John's wort
[ jŏnz ]

n.

Any of various herbs or shrubs of the genus Hypericum, having yellow flowers and used in alternative medicine as a treatment for mild depression.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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