noun🔗ShareThe disaccharide sugar of milk and dairy products, C12H22O11, a product of glucose and galactose used as a food and in medicinal compounds."Many people who are lactose intolerant have trouble digesting milk and other dairy products because they can't properly break down the lactose. "substancefoodchemistrybiochemistryphysiologymedicineChat with AIVocabulary GamePractice Reading