pesticide

noun

pes·​ti·​cide ˈpe-stə-ˌsīd How to pronounce pesticide (audio)
Synonyms of pesticidenext
: 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.
Organic pesticides can still have environmental impacts because they are designed to control living organisms. Anthony Reardon, Kansas City Star, 4 Apr. 2026 The previous version of BCI’s P&C covered soil health, biodiversity and natural habitats, water, pesticides and fertilizer use, along with livestock when relevant. Jennifer Bringle, Footwear News, 2 Apr. 2026 Bayer contends federal pesticide laws preempt failure-to-warn claims under state laws, because states cannot require additional labeling. ABC News, 2 Apr. 2026 The Environmental Working Group found that potatoes were one of the top vegetables to contain pesticide residues. Eleesha Lockett, Verywell Health, 2 Apr. 2026 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 7 Apr. 2026.

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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster