Monosaccharide Definition

A carbohydrate, C_xH_2xO_x, not decomposable by hydrolysis; esp., a hexose sugar, C₆H₁₂O₆, as glucose, fructose, or galactose.

Any of several carbohydrates, such as tetroses, pentoses, and hexoses, that cannot be broken down to simpler sugars by hydrolysis.