aloin: Meaning and Definition of

al•o•in

Pronunciation: (al'ō-in), [key]
— n. Pharm.
  1. an intensely bitter, crystalline, water-soluble powder composed of the active principles of and obtained from aloe, used chiefly as a purgative.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.