glucose, dextrose, or grape sugar, monosaccharide sugar with the empirical formula C₆H₁₂O₆ . This carbohydrate occurs in the sap of most plants and in the juice of grapes and other fruits. Glucose is a normal component of animal blood; it thus requires no digestion prior to absorption into the bloodstream. Glucose can be obtained by hydrolysis of a variety of carbohydrates, e.g., milk and cane sugars, maltose, cellulose, or glycogen, but it is usually manufactured by hydrolysis of cornstarch with steam and dilute acid; the corn syrup thus obtained contains also some dextrins and maltose. Glucose is used in the manufacture of candy, chewing gum, jams, jellies, table syrups, and other foods, and for many other purposes. It is the major source of energy in animal metabolism. Glucose tastes only about three-fourths as sweet as table sugar (sucrose). The presence of glucose can be detected by use of Fehling's solution; various modifications of this test are used to detect glucose in urine, which may be a symptom of diabetes.

or dextrose or grape sugar or corn sugar

Organic compound, a simple sugar (monosaccharide), chemical formula C₆H₁₂O₆. The product of photosynthesis in plants, it is found in fruits and honey. As the major circulating free sugar in blood, it is the source of energy in cell function and a major participant in metabolism. Control of its level and metabolism is of great importance (see insulin). Glucose and fructose make up sucrose. Glucose units in long chains make up polysaccharides (e.g., cellulose, glycogen, starch). Glucose is used in foods, medicine, brewing, and wine making and as the source of various other organic chemicals.

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