birthwort

noun

1. any of various plants of the genus Aristolochia, especially A. clematitis, an Old World species reputed to facilitate childbirth.Compare birthwort family.
2. any of various other plants believed to aid childbirth.
3. birthroot.

noun

1. any of several climbing plants of the genus Aristolochia, esp A. clematitis of Europe, once believed to ease childbirth: family Aristolochiaceae