macromoleculeA very large molecule such as a protein, polysaccharide, nucleic acid, or lipid. Macromolecules have a high relative molecular mass (molecular weight) and a structure which essentially comprises the multiple repetition of units derived, actually or conceptually, from molecules of low relative molecular mass. They are generally carbon-based and often of biological importance. Related category• BIOCHEMISTRYAlso on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History |