heptachlor


noun

  1. a highly toxic, light-tan, waxy solid, C10H5Cl7, used as an insecticide: its manufacture and use are restricted in the U.S.

  1. 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.

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