[ves-i-kuh nt]
  1. a vesicant agent or substance.
  2. (in chemical warfare) a chemical agent that causes burns and destruction of tissue both internally and externally.

Origin of vesicant

1655–65; < New Latin vēsīcant- (stem of vēsīcāns), present participle of vēsīcāre to vesicate; see -ant Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for vesicant

Historical Examples of vesicant

British Dictionary definitions for vesicant


vesicatory (ˈvɛsɪˌkeɪtərɪ)

noun plural -cants or -catories
  1. any substance that causes blisters, used in medicine and in chemical warfare
  1. acting as a vesicant

Word Origin for vesicant

C19: see vesica
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

Word Origin and History for vesicant

1660s, from Medieval Latin vesicantem (nominative vesicans), present participle of vesicare, from vesica "a bladder, a blister" (see ventral). From 1826 as an adjective.

Online Etymology Dictionary, © 2010 Douglas Harper

vesicant in Medicine


  1. A blistering agent, especially mustard gas, used in chemical warfare.
  1. Causing blisters.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.