pyrethroid

American  

[pahy-ree-throid, -reth-roid] / paɪˈri θrɔɪd, -ˈrɛθ rɔɪd /

noun

Chemistry.

1. any of several synthetic compounds that are similar to but more persistent than natural pyrethrins.

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pyrethroid British  

/ paɪˈriːθrɔɪd /

noun

1. any of various chemical compounds having similar insecticidal properties to pyrethrin

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adjective

1. of or relating to such compounds

Etymology

Origin of pyrethroid

First recorded in 1950–55; pyrethr(in) + -oid

Example Sentences

"Though considered to have low acute human toxicity, occupational exposure or accidental exposure through ingestion of pyrethroid insecticides may lead to dermal irritation, nausea and vomiting, and dizziness," the authors report.

From Salon • Aug. 24, 2024

But in recent years, resistance to the main insecticide used to treat nets, pyrethroid, has been spreading.

From Science Magazine • Mar. 15, 2023

Kasai noted that the mosquitoes with this mutation are unlikely to thrive in areas that do not use pyrethroid insecticides.

From Washington Post • Dec. 21, 2022

"Unfortunately in Puerto Rico, many of the pyrethroid insecticides met with a high degree of resistance," Frieden said.

From US News • May 9, 2016

Many farmers are also increasing their use of pyrethroid pesticides, spraying crops up to five times a year rather than just the normal one or two.

From Nature • May 19, 2015