aloin

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al·o·in

(al'ō-in),
A yellow crystalline principle composed of aloe-emodin and glucose, obtained from aloe; used as a laxative.
Synonym(s): aloetin, barbaloin

aloin

(ăl′ō-ĭn)
n.
A bitter yellow crystalline compound obtained from certain aloes and having laxative properties. Its use in laxatives was banned in the United States in 2002.

aloin (alˑ·ō·in),

n an extract of aloe that consists of several active chemical components, primarily barbaloin, and has cathartic properties. See also barbaloin.

aloin

the active constituent in aloes; used at one time as a purgative for horses.