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 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 Internationally, the fate of chlorpyrifos remains an open question. Sharon Lerner, ProPublica, 6 July 2023 Those limits -- and development of replacement pest controls -- have led to a decline in farmers’ use of chlorpyrifos, EPA said. John Flesher, chicagotribune.com, 18 Aug. 2021 Evidence on the pesticide's harm has been clear for more than 20 years, said Emily Marquez, staff scientist at the Pesticide Action Network, a group that has been pushing federal and state regulators to ban chlorpyrifos. Greg Stanley, Star Tribune, 22 Mar. 2021 Expansive research linked chlorpyrifos to brain damage and birth health defects in children. Palabra, al, 11 Feb. 2023 In August, the Biden administration banned the use of chlorpyrifos, a pesticide, on food crops after research linked exposure to neurological damage in children. Zoe Christen Jones, CBS News, 7 Apr. 2022 During the Trump administration, scientists recommended restricting the use of chlorpyrifos on food and vegetable crops, but this guidance was ignored by then-EPA Administrator Scott Pruitt, who said there needed to be additional studies. Catherine Garcia, The Week, 18 Aug. 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'chlorpyrifos.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 24 Jun. 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
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