Pesticide meaning

pĕstĭ-sīd
Frequency:
The definition of a pesticide is a chemical or other substance used to kill unwanted insects or weeds.

A spray used to kill ants is an example of a pesticide.

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A substance or agent used to kill pests, such as unwanted or harmful insects, rodents, or weeds.
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A chemical used to kill harmful animals or plants. Pesticides are used especially in agriculture and around areas where humans live. Some are harmful to humans, either from direct contact or as residue on food, or are harmful to the environment because of their high toxicity, such as DDT (which is now banned in many countries). Pesticides include fungicides, herbicides, insecticides, and rodenticides.
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Any chemical used for killing insects, weeds, etc.
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A substance or agent used to kill pests, such as unwanted or harmful insects, rodents, or weeds.
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A substance, usually synthetic although sometimes biological, used to kill or contain the activities of pests.
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Origin of pesticide

  • pest + -i- + -cide

    From Wiktionary