1. (noun)wild potato vine, wild sweet potato vine, man-of-the-earth, manroot, scammonyroot, Ipomoea panurata, Ipomoea fastigiata tropical American prostrate or climbing herbaceous perennial having an enormous starchy root; sometimes held to be source of the sweet potato Synonyms: manroot, man-of-the-earth, scammonyroot, wild potato vine, wild sweet potato vine