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[guh-lak-tohs] /gəˈlæk toʊs/
noun, Chemistry
a white, crystalline, water-soluble hexose sugar, C 6 H 12 O 6 , obtained in its dextrorotatory form from milk sugar by hydrolysis and in its levorotatory form from mucilages.
Origin of galactose
1865-70; galact- + -ose2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for galactose
  • Lactose is extracted by removing proteins and then dissolved to form glucose and galactose.
  • The simplest include glucose, fructose, and galactose.
British Dictionary definitions for galactose


/ɡəˈlæktəʊz; -əʊs/
a white water-soluble monosaccharide found in lactose. Formula: C6H12O6
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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galactose in Medicine

galactose ga·lac·tose (gə-lāk'tōs')
A monosaccharide commonly occurring in lactose. Also called brain sugar.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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galactose in Science
A monosaccharide commonly occurring in lactose and in certain pectins, gums, and mucilages. Chemical formula: C6H12O6.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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