permethrin
noun
per·meth·rin
(ˌ)pər-ˈme-thrən 
: a synthetic pyrethroid C21H20Cl2O3 used especially as an insecticide
Examples of permethrin in a Sentence
Recent Examples on the Web
Clothing and gear can be treated with a 0.5% permethrin spray, sold under names including Sawyer, Insect Shield and Ranger Ready.
—
Bay Area News Group, Mercury News, 12 Aug. 2025
Despite the insecticide’s toxicity to insects, permethrin has been researched thoroughly by the EPA and deemed safe for humans, Owen-Boerger said.
—Tammy Swift, Twin Cities, 2 July 2025
Consider wearing clothing that is pre-treated with permethrin, a synthetic chemical that acts as a tick repellent.
—Amy McGorry, FOXNews.com, 29 July 2025
Tea tree oil, cloves, neem oil (from an evergreen tree native to India), and turmeric have been shown to reduce the survival rate of mites, unlike permethrin and ivermectin.7
6.
—Rebeca Schiller, Verywell Health, 16 May 2025
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Bay Area News Group, Mercury News, 12 Aug. 2025
Despite the insecticide’s toxicity to insects, permethrin has been researched thoroughly by the EPA and deemed safe for humans, Owen-Boerger said.
—Tammy Swift, Twin Cities, 2 July 2025
Consider wearing clothing that is pre-treated with permethrin, a synthetic chemical that acts as a tick repellent.
—Amy McGorry, FOXNews.com, 29 July 2025
Tea tree oil, cloves, neem oil (from an evergreen tree native to India), and turmeric have been shown to reduce the survival rate of mites, unlike permethrin and ivermectin.7
6.
—Rebeca Schiller, Verywell Health, 16 May 2025
See All Example Sentences for permethrin
Cite this Entry
“Permethrin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/permethrin. Accessed 19 Aug. 2025.
Copy CitationMedical Definition
permethrin
noun
per·meth·rin
pər-ˈmeth-rən
: a synthetic pyrethroid pesticide C21H20Cl2O3 used especially against insects, ticks, and mites
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