scammony

noun pl. scammonies

1. a climbing Asian convolvulus (Convolvulus scammonia) with thick roots, arrowhead-shaped leaves, and white or purplish flowers
2. 1. any of several plants whose roots yield medicinal resins; specif., (Ipomoea orizabensis) of the morning-glory family
   2. the resin from the roots of any of these plants