an oily liquid with an extremely poisonous vapour, made by treating methanol with phosgene and chlorinating the product: has been used in chemical warfare. Formula: ClCOOCCl3
diphosgene in American English
(daɪˈfɑsˌdʒin)
noun
a poisonous, liquid compound, ClCO2CCl3, related to phosgene and used as a lung-irritant gas in chemical warfare