- a highly toxic, light-tan, waxy solid, C10H5Cl7, used as an insecticide: its manufacture and use are restricted in the U.S.
Origin of heptachlor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- A white or tan powder used as a pesticide. Because it is highly toxic to humans and is a suspected carcinogen, its use has been largely discontinued. Chemical formula: C10H5Cl7.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.