Cascara sagrada \Cas"ca*ra sa*gra"da\ [Sp.] Holy bark; the bark of the California buckthorn ({Rhamnus Purshianus}), used as a mild cathartic or laxative.
cascara sagrada n : dried bark of the cascara buckthorn used as a laxative [syn: {cascara}, {chittam bark}, {chittem bark}]