MSH: Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).,CSP: compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds; these compounds often form large macromolecules; for example, plastics, polypeptides, polysaccharides, and nucleic acids.,NCI: A molecule made up of a linked series of repeated monomers.,NCI: A molecule made up of small identical molecules called monomers. The monomers are joined together in a repeating pattern.