(|) ̷ ̷| ̷ ̷ ̷ ̷+ˌklōrōˈärˌsēn, -_sə̇n noun
also di·phen·yl·chlor·ar·sine +ˌklōrˈär-
Etymology: diphenyl + chlor- + arsine
: a colorless crystalline arsenical (C 6 H 5 ) 2 AsCl used during World War I especially by the Germans for producing a toxic smoke causing sneezing and vomiting