Dictionary.com
definitions

pyrethroid

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

noun Chemistry.

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

Nearby words

  1. pyrenean mountain dog,
  2. pyrenees,
  3. pyrenocarp,
  4. pyrenoid,
  5. pyrethrin,
  6. pyrethrum,
  7. pyretic,
  8. pyreto-,
  9. pyretogenesis,
  10. pyretogenic

Origin of pyrethroid

First recorded in 1950–55; pyrethr(in) + -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for pyrethroid

pyrethroid

/ (paɪˈriːθrɔɪd) /

noun

any of various chemical compounds having similar insecticidal properties to pyrethrin

adjective

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