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)