Any of various plants of the genus Prenanthes of the composite family, having bitter-tasting tuberous roots and clusters of white to purple usually nodding flower heads.
Any of a number of perennial plants (genus Prenanthes) of the composite family, with small, cylindrical, drooping heads and intensely bitter roots, formerly considered a cure for snakebite.
Any of various other plants formerly considered such a cure.
Origin of rattlesnake-root
- From the belief that the root cured a rattlesnake's bite
From American Heritage Dictionary of the English Language, 5th Edition