Definitions for lactoseˈlæk toʊs

This page provides all possible meanings and translations of the word lactose

Random House Webster's College Dictionary

lac•toseˈlæk toʊs(n.)

  1. a disaccharide, C12H22O11, present in milk, that upon hydrolysis yields glucose and galactose.

    Category: Biochemistry

  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.

    Ref: Also called milk sugar.

Origin of lactose:

1855–60; < L lact-, s. of lac milk + -ose2

Princeton's WordNet

  1. lactose, milk sugar(noun)

    a sugar comprising one glucose molecule linked to a galactose molecule; occurs only in milk

    "cow's milk contains about 4.7% lactose"


  1. lactose(Noun)

    The disaccharide sugar of milk and dairy products, CHO, (a product of glucose and galactose) used as a food and in medicinal compounds.

Webster Dictionary

  1. Lactose(noun)

    sugar of milk or milk sugar; a crystalline sugar present in milk, and separable from the whey by evaporation and crystallization. It has a slightly sweet taste, is dextrorotary, and is much less soluble in water than either cane sugar or glucose. Formerly called lactin

  2. Lactose(noun)

    see Galactose


  1. Lactose

    Lactose is a disaccharide sugar derived from galactose and glucose that is found in milk. Lactose makes up around 2~8% of milk, although the amount varies among species and individuals. It is extracted from sweet or sour whey. The name comes from lac or lactis, the Latin word for milk, plus the -ose ending used to name sugars. It has a formula of C12H22O11.

U.S. National Library of Medicine

  1. Lactose

    A disaccharide of GLUCOSE and GALACTOSE in human and cow milk. It is used in pharmacy for tablets, in medicine as a nutrient, and in industry.

Anagrams of lactose

  1. alecost, coletas, locates, scatole, talcose, to scale


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