单词 | cascara buckthorn |
释义 | cas·car·a buckthorn ![]() n. A buckthorn (Rhamnus purshiana syn. Frangula purshiana) native to western North America, the bark of which is the source of cascara sagrada. [Spanish cáscara, bark, from cascar, to break off, from Vulgar Latin *quassicāre, from Latin quassāre, frequentative of quatere, to shake; see kwēt- in the Appendix of Indo-European roots.] |
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