pyrethroid

noun
py·re·throid | \pī-ˈrē-ˌthrȯid, -ˈre- \

Definition of pyrethroid 

: any of various synthetic compounds that are related to the pyrethrins and resemble them in insecticidal properties

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Other Words from pyrethroid

pyrethroid adjective

Examples of pyrethroid in a Sentence

Recent Examples on the Web

Pyrethrins and pyrethroids also work by interfering with sodium pores. Karen Weintraub, Scientific American, "Revenge of the Super Lice," 1 June 2017 When pyrethroids were introduced into Israel in the early 1990s, just one treatment would destroy all the adult lice on an individual within a few weeks. Karen Weintraub, Scientific American, "Revenge of the Super Lice," 1 June 2017 Bug spray has high concentrations of a compound called pyrethroids. Dana Dovey, Newsweek, "What Is Katie? Drugs Mixed With Bug Spray Create Dangerous, Zombie-Like High," 21 Mar. 2018 Raid’s active ingredients, pyrethroids, are generally considered to be safe in small exposures, Rusyniak said. Robert Scheer, Indianapolis Star, "'Think what it’s doing to your brain': Using bug spray to get high," 18 Mar. 2018 Bifenthrin (a pyrethroid): Talstar; Bifenthrin, Ortho Home Defense and other brands. Dan Gill, NOLA.com, "How to spot, prevent and control sob webworms in your lawn," 29 July 2017 Pyrethroids can be toxic to bees and fish, the E.P.A. says, so treatments should avoid decorative ponds. Ann Carrns, New York Times, "Should You Subscribe to a Mosquito Control Service?," 14 July 2017 Residential services typically use insecticides registered with the Environmental Protection Agency, like pyrethrins, derived from chrysanthemum flowers; and pyrethroids, synthetic chemicals that mimic pyrethrins. Ann Carrns, New York Times, "Should You Subscribe to a Mosquito Control Service?," 14 July 2017 The situation is totally different in Europe, where treatment moved on from pyrethroids and virtually all insecticides about a decade ago, says Ian Burgess, president of the International Society of Phthirapterists (people who study lice). Karen Weintraub, Scientific American, "Revenge of the Super Lice," 29 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pyrethroid.' 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 pyrethroid

1949, in the meaning defined above

History and Etymology for pyrethroid

pyrethrin + -oid

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The first known use of pyrethroid was in 1949

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More Definitions for pyrethroid

pyrethroid

noun
py·re·throid | \pī-ˈrē-ˌthrȯid, -ˈreth-ˌrȯid \

Medical Definition of pyrethroid 

: any of various synthetic compounds that are related to the pyrethrins and resemble them in insecticidal properties

Other Words from pyrethroid

pyrethroid adjective

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