A sternutator, inhalation of which causes violent sneezing, cough, salivation, headache, and retrosternal pain; a common vomiting agent used in mob and riot control.
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di·phen·yl·chlor·ar·sine (di-fe″əl-klor-ahrґsin) sneezing gas, (C6H5)2AsCl, a toxic war gas that causes sneezing, coughing, headache, salivation, and vomiting.Medical dictionary. 2011.