LACTOSE

Pronunciation (US):

(GB):

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 Dictionary entry overview: What does lactose mean? 

• LACTOSE (noun)
  The noun LACTOSE has 1 sense:

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

  Familiarity information: LACTOSE used as a noun is very rare.

 Dictionary entry details 

• LACTOSE (noun)

Sense 1

Meaning:

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

Classified under:

Nouns denoting substances

Synonyms:

lactose; milk sugar

Context example:

cow's milk contains about 4.7% lactose

Hypernyms ("lactose" is a kind of...):

disaccharide (any of a variety of carbohydrates that yield two monosaccharide molecules on complete hydrolysis)

 Context examples 

This species is indole negative, liquefies gelatin, does not reduce nitrate and does not produce acid from lactose or ribose.

(Clostridium histolyticum, NCI Thesaurus)

Representative examples include diabetes mellitus, glycogen storage disease, mucopolysaccharidoses, and lactose intolerance.

(Carbohydrate Metabolism Disorder, NCI Thesaurus)

This species is nonmotile, nonsporeforming, catalase and indole negative and ferments arabinose, xylose, ribose, lactose and melezitose.

(Bifidobacterium longum, NCI Thesaurus)

This species nonmotile, non-spore forming, catalase and indole negative, does not reduce nitrate and ferments arabinose, xylose, ribose, gluconate, cellobiose, lactose, mannitol, melezitose, salicin, and starch.

(Bifidobacterium dentium, NCI Thesaurus)

This species is motile, oxidase and indole negative, catalase and citrate positive, ferments lactose and is considered a coliform bacteria.

(Enterobacter aerogenes, NCI Thesaurus)

This species is motile by peritrichous flagella, ferments lactose, indole negative, lysine decarboxylase negative and does not produce acid from sorbitol.

(Enterobacter amnigenus, NCI Thesaurus)

This species is catalase and oxidase positive, non-hemolytic, produces a yellowish pigment, reduces both nitrate and nitrite, synthesizes polysaccharides, and produces acid from glucose, maltose, fructose, and sucrose, but not mannose or lactose.

(Neisseria mucosa, NCI Thesaurus)

This species is catalase and oxidase positive, non-hemolytic, pigmented, susceptible to colistin, produces polysaccharides from sucrose, and does not produce acid from glucose, maltose, fructose, sucrose, mannose or lactose.

(Neisseria flavescens, NCI Thesaurus)

Lactose intolerance is very common in many parts of the world, and is caused in adults by a reduction in the enzyme that breaks lactose down into galactose and glucose in the intestine.

(Feeder Pathways for Glycolysis, NCI Thesaurus/BIOCARTA)

This species is nonmotile, non-spore forming, catalase and indole negative and ferments only lactose and cellobiose.

(Bifidobacterium bifidum, NCI Thesaurus)