1. A class of synthetic insecticides that mimic the structure and action of natural pyrethrins, used to kill or repel insects in agriculture, pest control, and consumer products.
Usage: plural form; used in chemistry, agriculture, and pest management contexts; technical/scientific term

Examples

• Pyrethroids are commonly used in mosquito control programs to reduce the spread of disease.
• The farmer applied pyrethroids to protect the crops from harmful insects.
• Many household insect sprays contain pyrethroids as their active ingredient.
• Pyrethroids work by disrupting the nervous system of target insects.
• The effectiveness of pyrethroids has made them popular in both agricultural and residential pest management.
• Some insects have developed resistance to certain pyrethroids over time.