Polymer

[Tanya Shivari]

A substance which has a molecular structure built up chiefly or completely from a large number of similar units bonded together, e.g. many synthetic organic materials used as plastics and resins.

[Justin Bieber]

a compound of high molecular weight derived either by the addition of many smaller molecules, as [polyethylene], or by the [condensation] of many smaller molecules with the elimination of water, alcohol, or the like, as nylon.
2.
a compound formed from two or more polymeric compounds.
3.
a product of [polymerization].