Therefore polymer refers to combination of repeating units. The definition of a natural polymer is a polymer that results from only raw materials that are found in nature. The polymer that is similar to the metal in terms of their electrical, electronic, magnetic, and optical properties is termed as ‘intrinsically conducting polymer (ICP)’ or ‘synthetic metal’. Polymers are all created by the process of polymerization wherein their constituent elements called monomers, are reacted together to form polymer chains i.e 3-dimensional networks forming the polymer bonds. 8. The simplest definition of a polymer is a useful chemical made of many repeating units. Due to its ability to be easily moulded into various shapes, it has a lot of applications. These types of polymers are used in surgical bandages, capsule coatings and in surgery. From the strand of our DNA which is a naturally occurring biopolymer to polypropylene which is used throughout the world as plastic. It is used in industries and various dairy products. 2. semi-synthesis polymers:- cellulose derivatives - cellulose acetate (rayon). So, a polymer is made of many repeating units. Bakelite and melamine are examples in this category. 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