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extinguishant

American  
[ik-sting-gwi-shuhnt] / ɪkˈstɪŋ gwɪ ʃənt /

noun

  1. a substance used in extinguishing fires.

extinguishant British  
/ ɪkˈstɪŋɡwɪʃənt /

noun

  1. a substance, such as a liquid, foam, powder, etc, used in extinguishing fires

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of extinguishant

extinguish + -ant

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.