noun[mass noun] Chemistry
A sugar present in milk. It is a disaccharide containing glucose and galactose units.
More 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.
Definition of lactose in:
- The US English dictionary