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English definition of “pesticide”

pesticide

noun [C or U] uk   /ˈpes.tɪ.saɪd/ us    /-t̬ə-/
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. Plant pathologyImproving fertility and pest control
(Definition of pesticide from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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