| 1. | any of certain composite plants of the genus Prenanthes, whose roots or tubers have been regarded as a remedy for snake bites, as P. serpentaria or P. alba. |
| 2. | the root or tuber. |
| 3. | the snakeroot, Polygala senega. |
| 4. | its root. |
| rattlesnake root n. Any of various plants of the genus Prenanthes, having bitter-tasting tuberous roots and white to purple ligulate flower heads. [From the belief that the root cured a rattlesnake's bite.] |