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chlorpyrifos

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

noun

  1. 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.

The team estimated each participant's long-term exposure to chlorpyrifos by combining California pesticide use records with residential and workplace addresses.

From Science Daily • Jun. 28, 2026

Researchers note that chlorpyrifos use has declined in recent years in the United States, but many people experienced exposure before restrictions were introduced.

From Science Daily • Jun. 28, 2026

The researchers found that chlorpyrifos interferes with a process known as autophagy.

From Science Daily • Jun. 28, 2026

The findings further suggest that individuals known to have had past exposure to chlorpyrifos might benefit from closer neurological monitoring.

From Science Daily • Mar. 16, 2026

Golf courses use high amounts of pesticides, like chlorpyrifos, which have been linked to Parkinson’s.

From The Wall Street Journal • Oct. 31, 2025

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