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forever chemicals

American  
[fawr-ev-er kem-i-kuhlz, fer-] / fɔrˈɛv ər ˌkɛm ɪ kəlz, fər- /

plural noun

  1. long-lasting chemicals, including PFAS and hydrofluorocarbons, used in the manufacture of common household items such as refrigerators, nonstick cookware, and flame-resistant furniture, that remain in the environment because they break down very slowly, and subsequently accumulate within animals and people.


Etymology

Origin of forever chemicals

Coined by U.S. academic and public health expert Joseph G. Allen in an opinion piece in The Washington Post (2018)

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Having elevated forever chemicals in their blood is not a guarantee residents will develop these conditions, but US and German authorities have suggested anyone with elevated levels should be offered further health screening.

From BBC ● Sep. 23, 2026

Sheen said PCBs were now known as "the godfather of forever chemicals".

From BBC ● Aug. 10, 2026

The bill marks the latest back-and-forth over PFAS, chemicals that are found in many different consumer, commercial and industrial products and are known as forever chemicals because some of their components don’t easily break down.

From Los Angeles Times ● Jul. 30, 2026

PFAS, widely known as "forever chemicals," are among the most stubborn pollutants scientists face today.

From Science Daily ● Jun. 16, 2026

Hundreds of Belgians living near a 3M plant have sued the US multinational maker of Post-it and Scotch tape over pollution from so-called "forever chemicals" in a trial that opens on Tuesday.

From Barron's ● Feb. 24, 2026

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