MSH: A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement.,CSP: aldohexose occurring as the D form and found as a free monosaccharide in fruits and other parts of plants and in the normal blood of all animals; the end product of carbohydrate metabolism and the chief source of energy for most living organisms.,NCI: A type of sugar; the chief source of energy for living organisms.,NCI: A hexose with an aldehyde group; in which each of the 5 remaining carbons other than the aldehyde group has one hydroxyl group in the R,S,R, and R configuration counting from the first hydroxyl containing carbon next to the aldehyde in the straight chain (Fisher) projection; otherwise all carbons have exclusively hydrogens. Occurs mostly as pyran (6-membered oxygen containing ring or oxane) and rarely as furan (5-membered oxygen containing ring) or straight chain. When glucose form