heptachlor definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a waxy solid, CHCl, similar to chlordane, formerly used as an insecticide
heptachlor definition by American Heritage Dictionary
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 white or tan powder, C10H5Cl7, formerly used as a pesticide, that is highly toxic to humans and is a suspected carcinogen.
Origin: hepta- + chlor(ine).
heptachlor - Science Definition
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.