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PFAS

American

[pee-fas] / ˈpiˌfæs /

noun

perfluoroalkyl and polyfluoroalkyl substances: long-lasting chemicals used in cleaning products, cookware coating, fire-fighting foams, makeup, stain-resistant carpeting, etc., that remain in the environment because they break down very slowly, and subsequently accumulate within animals and people: among the substances known as forever chemicals.

Etymology

Origin of PFAS

First recorded in 1990–95; by shortening

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.

The findings show that babies are exposed before birth to a diverse mix of PFAS, including perfluorinated chemicals, polyfluorinated chemicals, and fluorotelomers.

From Science Daily • Feb. 23, 2026

A Consumer Reports review of 41 types of powdered infant formula last year found that about half contained detectable levels of contaminants such as arsenic, lead and “forever chemicals” known as PFAS.

From The Wall Street Journal • Feb. 17, 2026

It will also make French authorities regularly test drinking water for all kinds of PFAS.

From Barron's • Dec. 30, 2025

Every set of turnout gear tested also contained brominated flame retardants, with extractable levels generally higher than those measured for PFAS.

From Science Daily • Dec. 18, 2025

"When we drink tap water, we are, depending on where you live, at varying levels of exposure to PFAS," Dr Amati said.

From BBC • Dec. 1, 2025

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023