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.
These small spheres work by releasing a pesticide into the air, typically either naphthalene or 1,4-dichlorobenzene. Samantha Johnson, Martha Stewart, 9 May 2026 Commercial pesticides can kill spiders, but there aren’t any good solutions for repelling them. Dan Simms, USA Today, 8 May 2026 Crowder often uses the farm-to-table food and circular fashion movements as parallels to help explain her belief in confronting issues like supply chain transparency, pesticide use, and unsustainable shipping practices. Liam Hess, Vogue, 7 May 2026 Instead of pausing mowing altogether, Ann Arbor now encourages residents to plant native species, shrink traditional turf lawns, limit pesticide use and reduce light pollution. CBS News, 7 May 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 11 May. 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