'Cascara buckthorn' definitions:

Definition of 'cascara buckthorn'

(from WordNet)
noun
Shrubby tree of the Pacific coast of the United States; yields cascara sagrada [syn: cascara buckthorn, bearberry, bearwood, chittamwood, chittimwood, Rhamnus purshianus]

Definition of 'Cascara buckthorn'

From: GCIDE
  • Cascara buckthorn \Cas"ca*ra buck"thorn`\ (Bot.) The buckthorn (Rhamnus Purshiana) of the Pacific coast of the United States, which yields cascara sagrada. [Webster 1913 Suppl.]