dried bark of the cascara buckthorn used as a laxative
Component of the dried bark of a buckthorn (Rhamnus purshiana) that contains the anthraquinone EMODIN. It is used as a laxative.
kas'ka-ra, n. the Cascara sagrada, a Californian bark used as a tonic aperient: the Cascara amarga, a bitter Honduras bark.--n. CASCARILL'A, the aromatic bitter bark of the West Indian Croton Eleuteria. [Sp.]