The root of Ipomæa (Convolvulus) Turpethum, a plant of Ceylon, Malabar, and Australia, which has a cathartic property. (See Indian jalap, under jalap.) It is sometimes called vegetable turpeth to distinguish it from mineral turpeth.
The root of Ipomœa Turpethum, a plant of Ceylon, Malabar, and Australia, formerly used in medicine as a purgative; — sometimes called vegetable turpeth.