a colourless insoluble toxic lachrymatory liquid used as a pesticide and a tear gas; nitrotrichloromethane. Formula: CCl3NO2
Word origin
C20: from chloro- + picro- + -in
chloropicrin in American English
(ˌklɔroʊˈpɪkrɪn)
noun
a colorless liquid, CCl3NO2, prepared by treating chloroform with concentrated nitric acid, and used in chemical warfare as a poison gas, and in insecticides, fungicides, etc.