pesticidenoun [ C or U ]
uk/ˈpes.tɪ.saɪd/us/ˈpes.tə.saɪd/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.
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herbicide
insecticide
Thesaurus: synonyms and related words
Plant pathology
- auxin
- blight
- canker
- dry rot
- Dutch elm disease
- etiolated
- excrescence
- fungicide
- herbicide
- insecticide
- node
- organophosphate
- rust
- scab
- sterility
- wither
- worm-eaten
- wormhole
You can also find related words, phrases, and synonyms in the topics:
Improving fertility & pest control