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Disaccharide

Disaccharide. A carbohydrate (q.v.), as sucrose (q.v.), maltose (q.v.), and lactose (q.v.), that consists of two hexose (q.v.) molecules, namely, dextrose (q.v.) in maltose, dextrose and fructose (q.v.) in sucrose, and dextrose and galactose (q.v.) in lactose (q.v.). The hexoses constitute the basic carbohydrate units that make up all polysaccharides (q.v.).