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pyrethroid

[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.
Origin of pyrethroid
1950-1955
First recorded in 1950-55; pyrethr(in) + -oid
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for pyrethroid

pyrethroid

/paɪˈriːθrɔɪd/
noun
1.
any of various chemical compounds having similar insecticidal properties to pyrethrin
adjective
2.
of or relating to such compounds
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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