chlorpyrifos

noun
chlor·​pyr·​i·​fos | \ klȯr-ˈpir-ə-fäs How to pronounce chlorpyrifos (audio) , -ˈpī-rə\

Definition of chlorpyrifos

: 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

In 2016, more than 640,000 acres were treated with chlorpyrifos in California alone. Lisa Friedman, New York Times, "E.P.A. Won’t Ban Chlorpyrifos, Pesticide Tied to Children’s Health Problems," 18 July 2019 Two other pesticides that the current administration allows are glyphosate and chlorpyrifos — both a threat to human health. Dp Opinion, The Denver Post, "Letters: Disappointment doesn’t lessen our love for country (7/22/19)," 22 July 2019 Oregon, Connecticut and New Jersey also are considering measures to take chlorpyrifos off the market. Washington Post, "EPA will not ban use of controversial pesticide linked to children’s health problems," 18 July 2019 Those pesticides included atrazine (26%), chlorpyrifos (59%), cypermethrin (49%), diazinon (60%), and permethrin (46%). Rebekah Tuchscherer, USA TODAY, "Study finds residue of pesticides, antibiotics and growth hormone in non-organic milk," 26 June 2019 Theories for their deaths ranged from exposure to a strong pesticide called chlorpyrifos – which is banned in the U.S. but used in Asian countries to tackle bedbugs – to a deliberate attempt to put poison in their drinks. Elizabeth Llorente, Fox News, "When dream vacations turn into tragedies: Many deaths at popular resorts remain mysteries," 12 June 2019 However, studies have found that chlorpyrifos causes brain damage in children. Julia Belluz, Vox, "The Trump administration’s attack on children’s health protections," 27 Sep. 2018 Health campaigners petitioned the EPA to determine that there is no safe exposure level for the chlorpyrifos, paving the way for a total ban. Julia Belluz, Vox, "The Trump administration’s attack on children’s health protections," 27 Sep. 2018 The administrator began reversing the proposal to ban the neurotoxic pesticide chlorpyrifos, going against all credible scientific advice. Umair Irfan, Vox, "Scott Pruitt is leaving behind a toxic mess at the EPA," 6 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'chlorpyrifos.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of chlorpyrifos

1970, in the meaning defined above

History and Etymology for chlorpyrifos

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

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Statistics for chlorpyrifos

Last Updated

4 Sep 2019

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The first known use of chlorpyrifos was in 1970

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More Definitions for chlorpyrifos

chlorpyrifos

noun
chlor·​pyr·​i·​fos | \ -ˈpir-ə-fäs, -ˈpī-rə- How to pronounce chlorpyrifos (audio) \

Medical Definition of chlorpyrifos

: a toxic crystalline organophosphate pesticide C9H11Cl3NO3PS that inhibits acetylcholinesterase and is used to control insect pests and ticks

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