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asphyxiant

American  
[as-fik-see-uhnt] / æsˈfɪk si ənt /

adjective

  1. asphyxiating or tending to asphyxiate.

noun

  1. an asphyxiating agent or substance.

  2. an asphyxiating condition.

asphyxiant British  
/ æsˈfɪksɪənt /

adjective

  1. causing asphyxia

"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

noun

  1. anything that causes asphyxia

    carbon monoxide is an asphyxiant
"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 asphyxiant

First recorded in 1850–55; asphyxi(ate) + -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.