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Sugar

(Science: biochemistry, chemistry) common Name for any sweet, crystalline, simple carbohydrate which is an aldehyde or ketone derivative of a polyhydric alcohol. Sugars are mainly disaccharides like sucrose and monosaccharides like fructose, all are soluble indilute alcohol or water and are white in their pure form. A white crystalline carbohydrate used as a sweetener and preservative.An essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain.A simple form of carbohydrate consisting of [[monosaccharide Units, of which there are many different types of sugar, e.g. [[sucrose, [[fructose and [[glucose. The Monosaccharide components can be adjoined to form more complex sugars, disaccharides.