Adjacent Words

lactose definitions

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WordNet (r) 3.0 (2005)

n
1: a sugar comprising one glucose molecule linked to a galactose molecule; occurs only in milk; "cow's milk contains about 4.7% lactose" [syn: lactose, milk sugar]

Merriam Webster's

noun Etymology: International Scientific Vocabulary Date: 1857 a disaccharide sugar C₁₂H₂₂O₁₁ that is present in milk and yields glucose and galactose upon hydrolysis and yields especially lactic acid upon fermentation

Oxford Reference Dictionary

n. Chem. a sugar that occurs in milk, and is less sweet than sucrose. Etymology: as LACTO-

Webster's 1913 Dictionary

Lactose Lac"tose`, n. 1. (Physiol. Chem.) 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. (Chem.) See Galactose.

Webster's 1913 Dictionary

Galactose Ga*lac"tose, n. (Chem.) A white, crystalline sugar, C6H12O6, isomeric with dextrose, obtained by the decomposition of milk sugar, and also from certain gums. When oxidized it forms mucic acid. Called also lactose (though it is not lactose proper).

Collin's Cobuild Dictionary

Lactose is a type of sugar which is found in milk and which is sometimes added to food.