Meaning of pyrethrin

py•re•thrin

Pronunciation: (pī-rē'thrin, -reth'rin), [key]
— n. Chem.
  1. Also calleda viscous, water-insoluble liquid, CHO, extracted from pyrethrum flowers, used as an insecticide.
  2. Also calleda like compound, CHO, obtained and used similarly.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.