- any of various plants or shrubs of the genus Hypericum, having yellow flowers and transparently dotted leaves.
Origin of St.-John's-wort
First recorded in 1745–55; so named because gathered on St. John's Eve to ward off evil
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
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