pesticide
noun [ C or U ] uk/ˈpes.tɪ.saɪd/ us/ˈpes.tə.saɪd/
杀虫剂，农药
a chemical substance used to kill harmful insects, small animals, wild plants, and other unwanted organisms
The pesticides that farmers spray on their crops kill pests, but they can also damage people's health. 农民在作物上喷洒的农药在杀死害虫的同时也会危害人们的健康。
Compare: herbicideinsecticide