- any of several synthetic compounds that are similar to but more persistent than natural pyrethrins.
Origin of pyrethroid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any of various chemical compounds having similar insecticidal properties to pyrethrin
- 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