The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A colorless insecticide, C10H19ClNO5P, used to control mites, beetles, aphids, and other plant pests.
Origin: phosph(ate) + amid(e) + -on3.