DictionarypolymerSubstance with repeating molecular units
noun

polymer

PAH-lih-mer/ˈpɑːlɪmər/

A substance made of large molecules built from repeating units.

The plastic polymer contains long molecules made from repeating structural units.

A plain translucent plastic strip with a connected magnified cutaway revealing several long molecular chains, each composed of the same repeating structural unit.
Etymology

“Many parts” describes a polymer's construction: a large number of simple molecular units make up the larger substance. In the selected sense, those repeating units form long chains.

In context

SOR Outreach0:04
gels are a jelly-like material made mostly of liquid but with a little polymer added to make them solid
Incredible Swelling Gels (ft. Dr. Rothstein, Abigail, and co.)

More examples

  • Natural rubber is a polymer.
  • The engineers test several polymers for flexibility.
  • Starch is a natural polymer made of repeating sugar units.

Forms

polymer · polymers

polymeric adjective — Made of molecules with repeating units.

polymerize verb — To combine small molecules into polymers.

Similar words

plastic
Plastic is moldable polymer material, often mixed with additives.