Cascara-buckthorn definition

kă-skărə
A buckthorn (Rhamnus purshiana syn. Frangula purshiana) native to western North America, the bark of which is the source of cascara sagrada.
noun
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Origin of cascara-buckthorn

  • Spanish cáscara bark from cascar to break off from Vulgar Latin quassicāre from Latin quassāre frequentative of quatere to shake kwēt- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition