/ Dictionary / Index H heptachlor: Meaning and Definition of Find definitions for: hep•ta•chlor Pronunciation: (hep'tu-klôr", -klōr"), [key] — n. a highly toxic, light-tan, waxy solid, CHCl, used as an insecticide: its manufacture and use are restricted in the U.S. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hepta- heptachord Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language