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A polymer (/ËpÉlÉ¨mÉr/) (Greek poly- , many + -mer, parts) is a large molecule, or macromolecule, composed of many repeated subunits.
Etymology: Gk, polys + meros, part. a compound formed by combining or linking a number of monomers, or small molecules. A polymer may be composed of many units of more than one type of monomer (a copolymer) or of many units of the same monomer (a homopolymer).