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milk sugar

 - 10 dictionary results

lac⋅tose

[lak-tohs]
–noun
1. Biochemistry. a disaccharide, C12H22O11, present in milk, that upon hydrolysis yields glucose and galactose.
2. a white, crystalline, sweet, water-soluble commercial form of this compound, obtained from whey and used in infant feedings, in confections and other foods, in bacteriological media, and in pharmacology as a diluent and excipient.


Origin:
1855–60; lact- + -ose 2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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lac·tose   (lāk'tōs')   
n.  
  1. A disaccharide, C12H22O11, found in milk, that may be hydrolyzed to yield glucose and galactose.

  2. A white crystalline substance obtained from whey and used in infant foods, bakery products, confections, and pharmaceuticals as a diluent and excipient. Also called milk sugar.

milk sugar  
n.  See lactose.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

lactose 
sugar from milk, 1858, from Fr., coined by Fr. chemist Marcelin-Pierre-Eugène Berthelot (1827-1907) from L. lac "milk" (see lactation) + suffix -ose.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: lac·tose
Pronunciation: 'lak-"tOs, -"tOz
Function: noun
: a disaccharide sugar C12H22O11 that is presentin milk, yields glucose and galactose upon hydrolysis, yields especially lactic acid upon fermentation, and is used chiefly in foods, medicines, and culture media (as for the manufacture of penicillin)called also milk sugar

Main Entry: milk sugar
Function: noun
: LACTOSE
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

lactose lac·tose (lāk'tōs')
n.

  1. A disaccharide in milk that hydrolyzes to yield glucose and galactose. Also called milk sugar.

  2. A white crystalline substance obtained from whey and used in infant foods and in pharmaceuticals as a diluent and excipient. Also called milk sugar.

milk sugar n.
See lactose.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
lactose   (lāk'tōs')  Pronunciation Key 
  1. A white crystalline disaccharide consisting of a glucose and a galactose molecule, found in milk and used in the manufacture of various other foods. Chemical formula: C12H22O11.

  2. The inability to digest lactose properly is called lactose intolerance. It is caused by a deficiency of the enzyme lactase and marked by abdominal cramping and other symptoms after ingesting lactose.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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