Polymers The word “ Polymer ” is derived from two Greek words, ‘Poly’ that means many (numerous) and ‘Mer’ which means units. In basic terms, a polymer is a long-chain molecule that is composed of a large number of repeating units of identical structure. These identical structures, we understand as a unit made up of two or more molecules, join together to form a long chain. A polymer is a molecule made up of numerous small molecules called monomers that are joined together to form a larger molecule. The word " polymer " is made up of two parts: "poly" which means "many," and "mer" which means "unit." Classification of Polymers The polymers are classified into various types based on different categories that are as ... A polymer is a substance composed of macromolecules, which are formed by repeating units derived from monomers. Learn about natural and synthetic polymers, their properties, applications, and how they are synthesized by different methods. Polymers are substances made of macromolecules, molecules with a high molar mass composed of repeating units