cascara buckthorn

from WordNet (r) 3.0 (2006)
cascara buckthorn
    n 1: shrubby tree of the Pacific coast of the United States;
         yields cascara sagrada [syn: {cascara buckthorn},
         {bearberry}, {bearwood}, {chittamwood}, {chittimwood},
         {Rhamnus purshianus}]
from The Collaborative International Dictionary of English v.0.48
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.]
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