pesticide

noun

pes·​ti·​cide ˈpe-stə-ˌsīd How to pronounce pesticide (audio)
: an agent used to destroy pests
pesticidal adjective

Examples of pesticide in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
By studying the birds’ nests, including those that are no longer in use, researchers can better understand factors that make habitats suitable, such as the basis of their diet or the effects of pesticides in the area, Margalida said. Taylor Nicioli, CNN Money, 10 Oct. 2025 The 10 dead roaches were a testament to the efficacy of the tracking power pesticide. David J. Neal, Miami Herald, 7 Oct. 2025 Consider using pesticides for severe infestations of adult beetles. Arricca Elin Sansone, Southern Living, 6 Oct. 2025 The Bardwells rotate their crops, minimize their use of pesticides, and presumably contribute to the de-poisoning of America’s K-12 cafeterias. Jessica Winter, New Yorker, 4 Oct. 2025 See All Example Sentences for pesticide

Word History

First Known Use

circa 1925, in the meaning defined above

Time Traveler
The first known use of pesticide was circa 1925

Browse Nearby Words

Cite this Entry

“Pesticide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pesticide. Accessed 13 Oct. 2025.

Kids Definition

pesticide

noun
pes·​ti·​cide ˈpes-tə-ˌsīd How to pronounce pesticide (audio)
: a substance used to destroy pests
pesticidal
ˌpes-tə-ˈsīd-ᵊl
adjective

Medical Definition

pesticide

noun
pes·​ti·​cide ˈpes-tə-ˌsīd How to pronounce pesticide (audio)
: an agent used to destroy pests
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