ipomoea

1 capitalized :  a genus of herbaceous vines (family Convolvulaceae) that comprise forms (as the morning glories and the sweet potato, I. batatas) having showy bell- or funnel-shaped flowers and that include some which are sources of cathartic resins or psychoactive alkaloids (as lysergic acid amide)

2 also ipomea :  a plant or flower of the genus Ipomoea

3 usually ipomea :  the dried root of a scammony (Ipomoea orizabensis)