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Materials Science and Engineering: Polymers. A polymer (the name means many parts) is long chain molecule made up many repeating units, called monomers. Polymers can be natural (organic) or synthetic.
Man-made polymers include plastics like the one composing these water bottles. If you've ever made a long paper chain, you already have a visual image of a polymer. The term comes from the Greek words poly, meaning many, and meros, meaning part.. Combine the two and you get many parts.. The simplest definition of a polymer is long chain formed by joining many smaller molecules, called monomers [source: Larsen]. While a paper chain presents a simple image of a polymer, in practical applications, polymers have much greater uses.