PFAS

Noun

 * 1)  a perfluoroalkyl substance
 * 2)  a polyfluoroalkyl substance
 * 1)  a perfluoroalkyl substance
 * 2)  a polyfluoroalkyl substance
 * 1)  a perfluoroalkyl substance
 * 2)  a polyfluoroalkyl substance
 * 1)  a polyfluoroalkyl substance

Usage notes

 * Although is sometimes used as a singular noun, several organizations including the US Environmental Protection Agency and the Centers for Disease Control and Prevention define the term only in the plural (substances) and discourage the use of.

Etymology
From.

Noun

 * 1) PFAS