Related Searches
Nearby Words
Related Questions
What causes lactose intolerance?
What foods contain lactose?

lactose

 [lak-tohs]   Origin

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.
Milk Myths www.dairycouncilofca.org/ Common milk myths are debunked
Ad
Also called milk sugar, sugar of milk.

Origin:
1855–60; lact- + -ose2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To Lactose

00:10

00:09

00:08

00:07

00:06

00:05

00:04

00:03

00:02

00:01

Lactose is always a great word to know.
So is americium. Does it mean:
Symbol: Am; atomic weight: 243; atomic number: 95
Symbol: Sr; atomic weight: 87.62; atomic number: 38
LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...
Collins
World English Dictionary
lactose (ˈlæktəʊs, -təʊz)
 
—n
Also called: milk sugar a white crystalline disaccharide occurring in milk and used in the manufacture of pharmaceuticals and baby foods. Formula: C12H22O11

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
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, © 2010 Douglas Harper
Cite This Source
American Heritage
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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
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.
Cite This Source
Partners:WordBloglinesCitysearchThe Daily BeastAsk AnswersAsk KidsLife123SendoriThesaurus
Dictionary.com, LLC. Copyright © 2012. All rights reserved.
About Privacy Policy Terms of Use API Careers Advertise with Us Contact Us Help
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT