lactose, milk sugar - a sugar comprising one glucose molecule linked to a galactose molecule; occurs only in milk; "cow's milk contains about 4.7% lactose"

malt sugar, maltose - a white crystalline sugar formed during the digestion of starches

oligosaccharide - any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis

saccharose, sucrose - a complex carbohydrate found in many plants and used as a sweetening agent