from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An oily, volatile liquid, (ClCH2CH2)2S, that is corrosive to the skin and mucous membranes and causes severe, sometimes fatal respiratory damage. It was introduced in World War I as a chemical warfare agent.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A vesicant gas, bis (2-chloroethyl) sulfide, (ClC2H4)2S, once used in chemical warfare; one of the sulfur mustard class of compounds.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a toxic war gas with sulfide based compounds that raises blisters and attacks the eyes and lungs; there is no known antidote


From its smell.
(American Heritage® Dictionary of the English Language, Fourth Edition)


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  • Makes you vomit and breathing becomes very difficult. If you survive, damage to stomach and lungs lasts for ages after.

    August 18, 2009