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Entry 1 sense Webster, 1913

Cascara buckthorn

· Cas·ca·ra buck·thorn · IPA
01 The buckthorn (Rhamnus Purshiana) of the Pacific coast of the United States, which yields cascara sagrada.
  1. 1.
    The buckthorn (Rhamnus Purshiana) of the Pacific coast of the United States, which yields cascara sagrada.(Bot.)