irritant

[ ir-i-tnt ]
/ ˈɪr ɪ tnt /

adjective

tending to cause irritation; irritating.

noun

anything that irritates.
Physiology, Pathology. a biological, chemical, or physical agent that stimulates a characteristic function or elicits a response, especially an inflammatory response.

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Origin of irritant

1630–40; <Latin irrītant- (stem of irrītāns), present participle of irrītāre to irritate; see -ant

OTHER WORDS FROM irritant

ir·ri·tan·cy, nounnon·ir·ri·tan·cy, nounnon·ir·ri·tant, adjectiveun·ir·ri·tant, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for irritant

British Dictionary definitions for irritant

irritant
/ (ˈɪrɪtənt) /

adjective

causing irritation; irritating

noun

something irritant

Derived forms of irritant

irritancy, noun
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

Medical definitions for irritant

irritant
[ ĭrĭ-tənt ]

adj.

Causing irritation, especially physical irritation.

n.

A source of irritation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.