Scammony

Webster's Dictionary of the English Language

·noun A species of bindweed or Convolvulus (C. Scammonia).

II. Scammony ·noun An inspissated sap obtained from the root of the Convolvulus Scammonia, of a blackish gray color, a nauseous smell like that of old cheese, and a somewhat acrid taste. It is used in medicine as a cathartic.