Definition of "cascara" []

• A buckthorn (Rhamnus purshiana) native to northwest North America, the bark of which is the source of cascara sagrada. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.