Noun
chlordane (countable and uncountable, plural chlordanes)
(organic chemistry) A very toxic chlorinated polycyclic hydrocarbon once used as an insecticide.
In 1950, Dr. Arnold J. Lehman, who is the chief pharmacologist of the Food and Drug Administration, described chlordane as “one of the most toxic of insecticides,” adding, “Anyone handling it could be poisoned.” Source: Internet
The next year, flies were resistant to DDT and chlordane. Source: Internet