scammonyPronunciation: /ˈskaməni/Definition of scammony noun a plant of the convolvulus family, the dried roots of which yield a strong purgative. Two species in the family Convolvulaceae: Convolvulus scammonia of Asia, and Ipomoea orizabensis of Mexico Origin: Old English, from Old French escamonie or Latin scammonia, from Greek skammōniascammony in other Oxford dictionaries Definition of scammony in the US English dictionary