Chemistry, Pharmacology. a yellowish to white, crystalline, water-soluble, levorotatory ketose sugar, C 6 H 12 O 6 , sweeter than sucrose, occurring in invert sugar, honey, and a great many fruits: used in foodstuffs and in medicine chiefly in solution as an intravenous nutrient.
fructose fruc·tose (frŭk'tōs', fruk'-) n. A very sweet sugar occurring in many fruits and honey and used as a preservative for foodstuffs and as an intravenous nutrient. Also called fruit sugar, levulose.
(frŭk'tōs') A simple sugar (monosaccharide) found in honey, many fruits, and some vegetables. Fructose linked to glucose is the structure of table sugar, or sucrose. Fructose is an important source of energy for cellular processes. Chemical formula:C6H12O6.