Definition of lactose in English:

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Pronunciation: /ˈlakˌtōs/
Pronunciation: /ˈlakˌtōz/


A sugar present in milk. It is a disaccharide containing glucose and galactose units.
Example sentences
  • The common sugars that form part of the diet are sucrose, lactose (milk sugar), and maltose.
  • The enzyme lactase breaks down the lactose to galactose and glucose.
  • Soymilk does not contain lactose (milk sugar) and can be drunk by those who are allergic to normal milk.

For editors and proofreaders

Syllabification: lac·tose

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