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aloin

[al-oh-in]
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noun Pharmacology.
  1. an intensely bitter, crystalline, water-soluble powder composed of the active principles of and obtained from aloe, used chiefly as a purgative.
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Origin of aloin

First recorded in 1835–45; aloe + -ine2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for aloin

aloin

noun
  1. a bitter crystalline compound derived from various species of aloe: used as a laxative and flavouring agent
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Word Origin

C19: from aloe + -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
aloin in Medicine

aloin

(ăl′ō-ĭn)
n.
  1. A bitter, yellow crystalline compound obtained from aloe and used as a laxative.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.