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chlorpyrifos

American

[klawr-pir-uh-fos, klohr-] / klɔrˈpɪr əˌfɒs, kloʊr- /

noun

a broad-spectrum insecticide, C 9 H 11 Cl 3 NO 3 PS, used on lawns and ornamental plants.

Etymology

Origin of chlorpyrifos

chlor- ² + pyri(dine) + -fos, for phosphorus

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

chlorpyrifos

The team exposed mice to chlorpyrifos in aerosol form for 11 weeks.

From Science Daily ● Nov. 1, 2026

Although chlorpyrifos use has declined in the United States, many people were exposed before restrictions were introduced, and related agricultural chemicals remain widely used.

From Science Daily ● Nov. 1, 2026

It is California’s first major pesticide phaseout since 2019, when regulators announced the state was ending virtually all uses of chlorpyrifos, a pesticide linked to neurological issues.

From Los Angeles Times ● Aug. 11, 2026

Mice were exposed to aerosolized chlorpyrifos for 11 weeks using inhalation methods designed to mimic the way people typically encounter the pesticide in the environment.

From Science Daily ● Jun. 28, 2026

The results suggest that chlorpyrifos can damage critical nerve cells involved in movement and may play a direct role in the development of Parkinson's disease.

From Science Daily ● Jun. 28, 2026

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023