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[man-i-tawl, -tol] /ˈmæn ɪˌtɔl, -ˌtɒl/
Chemistry. a white, crystalline, sweetish, water-soluble, carbohydrate alcohol, C 6 H 8 (OH) 6 , occurring in three optically different forms, the common one being found in the manna of the ash Fraxinus ornus and in other plants: used chiefly in the manufacture of resins, electrolytic condensers for radios, plasticizers, and mannitol hexanitrate, and as a pill excipient.
Pharmacology. the substance used as an osmotic diuretic to reduce intraocular and intracranial pressures.
Origin of mannitol
First recorded in 1875-80; mannite + -ol1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for mannitol


a white crystalline water-soluble sweet-tasting alcohol, found in plants and used in diet sweets and as a dietary supplement (E421). Formula: C6H14O6
Derived Forms
mannitic (məˈnɪtɪk) adjective
Word Origin
from mannose + -ite² + -ol1
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
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mannitol in Medicine

mannitol man·ni·tol (mān'ĭ-tôl', -tōl')
A white, crystalline, water-soluble, slightly sweet alcohol, used as a dietary supplement and dietetic sweetener and in medical tests of renal function.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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mannitol in Science
  (mān'ĭ-tôl', -tōl')   
A white, crystalline, water-soluble, slightly sweet alcohol that is used as a dietary supplement and dietetic sweetener and in medical tests of kidney function. Mannitol occurs naturally as an important food storage and transportation molecule in brown algae like kelp. Chemical formula: C6H14O6.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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