- the dried tuberous root of any of several plants, especially Exogonium purga, of the morning glory family, or the light yellowish powder derived from it, used in medicine chiefly as a purgative.
- any of these plants.
- a Mexican convolvulaceous plant, Exogonium (or Ipomoea) purga
- any of several similar or related plants
- the dried and powdered root of any of these plants, used as a purgative
- the resin obtained from any of these plants