Pronunciation: (bûrth'wûrt", -wôrt"), [key]
1. any of various plants of the genus Aristolochia, esp. A. clematitis, an Old World species reputed to facilitate childbirth. Cf. birthwort family.
2. any of various other plants believed to aid childbirth.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.