1. Plural of chlordan; a class of synthetic organic pesticides containing chlorine, formerly used to control insects in agriculture and on crops.
Usage: technical; chemistry/agriculture; largely discontinued due to environmental and health concerns

Examples

• Chlordans were widely applied to cotton and corn crops during the mid-20th century.
• The use of chlordans has been restricted or banned in many countries due to persistence in the environment.
• Researchers studied the effects of chlordans on soil microorganisms.
• Chlordans accumulate in fatty tissues of animals over time.
• The EPA phased out most chlordans in the United States by the 1980s.