chlorpyrifos

noun

chlor·​pyr·​i·​fos klȯr-ˈpir-ə-fäs How to pronounce chlorpyrifos (audio)
-ˈpī-rə
: a toxic crystalline organophosphate pesticide C9H11Cl3NO3PS that inhibits acetylcholinesterase and is used to control insect pests and ticks

Examples of chlorpyrifos 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.
President Trump reversed a pending ban on the insecticide chlorpyrifos, a brain-damaging chemical linked to ADHD and autism after meeting with the CEO of Dow Chemical, chlorpyrifos’s biggest manufacturer, and after the company donated $1 million to Trump’s inauguration. Errol Schweizer, Forbes, 24 Oct. 2024 Before it was banned, more than 900,000 pounds of chlorpyrifos were used in 2017— more than in any other state. Melissa Gomez, Los Angeles Times, 30 Sep. 2024 Another example: chlorpyrifos, a pesticide linked to brain damage in children and fetuses. Sandee Lamotte, CNN, 20 Mar. 2024 It was banned from residential use in the United States in 2001, and in 2011, Environmental Protection Agency scientists were unable to find any safe level of exposure to chlorpyrifos. Star Tribune, 27 Oct. 2020 See all Example Sentences for chlorpyrifos 

Word History

Etymology

chlor- + pyridine + -fos (alteration of phosphorus)

First Known Use

1970, in the meaning defined above

Time Traveler
The first known use of chlorpyrifos was in 1970

Dictionary Entries Near chlorpyrifos

Cite this Entry

“Chlorpyrifos.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chlorpyrifos. Accessed 21 Nov. 2024.

Medical Definition

chlorpyrifos

noun
chlor·​pyr·​i·​fos -ˈpir-ə-fäs, -ˈpī-rə- How to pronounce chlorpyrifos (audio)
: a toxic crystalline organophosphate pesticide C9H11Cl3NO3PS that inhibits acetylcholinesterase and is used to control insect pests and ticks
Last Updated: - Updated example sentences
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