insecticidal

adjective

in·​sec·​ti·​cid·​al (ˌ)in-ˌsek-tə-ˈsī-dᵊl How to pronounce insecticidal (audio)
1
: destroying or controlling insects
2
: of or relating to an insecticide
insecticidally adverb

Examples of insecticidal 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.
To control them, use an insecticidal soap, but be sure to spray underneath the leaves. Mary Marlowe Leverette, Southern Living, 30 May 2026 Typically, insecticidal soap is a safe option when treating these pests. Madeline Buiano, Martha Stewart, 27 May 2026 Many pest problems in home gardens respond well to organic products such as neem oil or insecticidal soap. Lauren David, Better Homes & Gardens, 17 May 2026 Control aphids feeding in new shoots with an insecticidal soap spray. Tom MacCubbin, The Orlando Sentinel, 25 Apr. 2026 See All Example Sentences for insecticidal

Word History

First Known Use

1857, in the meaning defined at sense 1

Time Traveler
The first known use of insecticidal was in 1857

Browse Nearby Words

Cite this Entry

“Insecticidal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insecticidal. Accessed 8 Jun. 2026.

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