an organic pesticide, usually an insecticide, containing chlorine and hydrogen, including chlorinated hydrocarbons (e.g., DDT), cyclohexane derivatives (e.g., lindane), cyclodienes (e.g., chlordane), and polychloroterpenes —note organochlorine pesticides are toxic to vertebrates, persist in the environment, and accumulate in the food chainThis definition last updated 07/22/2008