Meaning of St.-John's-wort

St.-John's-wort

Pronunciation: (sānt"jonz'wûrt", -wôrt"), [key]
— n.
  1. any of various plants or shrubs of the genus Hypericum, having yellow flowers and transparently dotted leaves.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.