Dictionary

lactose

noun lac·tose \ˈlak-ˌtōs, -ˌtōz\

chemistry : a type of sugar that is present in milk

Full Definition of LACTOSE

:  a disaccharide sugar C12H22O11 that is present in milk and yields glucose and galactose upon hydrolysis and yields especially lactic acid upon fermentation

Origin of LACTOSE

International Scientific Vocabulary
First Known Use: 1857

lactose

noun lac·tose \ˈlak-ˌtōs, -ˌtōz\   (Medical Dictionary)

Medical Definition of LACTOSE

:  a disaccharide sugar C12H22O11 that is present in milk, yields glucose and galactose upon hydrolysis, yields especially lactic acid upon fermentation, and is used chiefly in foods, medicines, and culture media (as for the manufacture of penicillin)—called also milk sugar

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