A polymer is a large molecule composed of repeating structural units called monomers, which are covalently bonded together. The term "polymer" comes from the Greek words "poly" (meaning "many") and "mer" (meaning "part"). Polymers can be found in nature, such as proteins, nucleic acids, and cellulose, or can be synthesized chemically in laboratories and industries, resulting in materials like plastics, rubber, and synthetic fibers.
Polymers vary