polyester

American  

[pol-ee-es-ter, pol-ee-es-ter] / ˈpɒl iˌɛs tər, ˌpɒl iˈɛs tər /

noun

• polyesters
  plural

1. Chemistry. a polymer in which the monomer units are linked together by the group –COO–, usually formed by polymerizing a polyhydric alcohol with a polybasic acid: used chiefly in the manufacture of resins, plastics, and textile fibers.

2. Also called poly. a fabric made from such textile fibers.

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polyester British  

/ ˌpɒlɪˈɛstə /

noun

1. any of a large class of synthetic materials that are polymers containing recurring -COO- groups: used as plastics, textile fibres, and adhesives

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polyester Scientific  

/ pŏl′ē-ĕs′tər /

1. Any of various mostly synthetic polymers that are light, strong resins resistant to weather and corrosion. Polyesters are long chains of esters and are used to make fibers and plastics. They are thermosetting. Some polyesters, such as suberin, occur naturally.

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Other Word Forms

Derived Forms

• polyesterification
  noun

Inflected Forms

Nouns

• polyesters
  plural

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Etymology

Origin of polyester

First recorded in 1925–30; poly- + ester

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Explanation

Polyester is a synthetic fabric used in everything from kayaks to shirts. Polyester clothes were popular in the 1970s, but they stink if you disco dance in them for too long. Polyester doesn’t breathe! You might think of polyester as a cheap alternative to a natural fabric like wool, silk, or cotton. In certain situations, though, polyester is ideal. Shirts that are a blend of cotton and polyester, for example, don't wrinkle easily; and a sofa covered in polyester is easy to clean. Polyester jackets are often quick drying or even waterproof. Polyester comes from a combination of two common words in chemistry, polymer (having many parts) and -ester (a chemical compound).

Example Sentences

See Examples For:

polyester polyesters

It could break polyester chains into their individual building blocks, known as monomers, while also cleaving penicillin.

From Science Daily ● Oct. 16, 2026

Ali likes to use expansive spaces and incorporate fabrics and textiles, whether it’s a red, sequin-covered chador or a tubular-looking worm made out of polyester, Lycra and spandex.

From Los Angeles Times ● Sep. 25, 2026

He also contributed to a 2024 study that found that cotton and polyester microfibers disrupted the development of sea urchin embryos.

From The Wall Street Journal ● Sep. 24, 2026

She added that she is noticing "people are willing to spend a little bit more" on wardrobe staples and items that "wash well and are made of cotton, not acrylic or polyester".

From BBC ● Sep. 18, 2026

Her clothes have a dangerously high percentage of polyester.

From "Speak" by Laurie Halse Anderson

Dark colours are better than light colours, while some materials, such as denim and shiny polyesters, are thick and therefore useful barriers.

From BBC ● Jun. 19, 2026

For example, a fleece jacket is made with PET-based polyesters alongside polyolefins or polyamides.

From Science Daily ● Nov. 17, 2023

China's glutted market in polyethylene and polyesters after years of rapid petrochemical capacity expansion is prompting some of the shift.

From Reuters ● Jul. 24, 2023

Materials experts say that alternatives including glass, ceramics, linoleum and polyesters are feasible substitutes in most cases.

From Los Angeles Times ● Mar. 7, 2023

Such polymers, called polyesters, are also found in plant fibers, which bacteria have had millions of years to evolve to feed on.

From Science Magazine ● Jul. 1, 2021

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