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heptachlor

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WordReference Random House Unabridged Dictionary of American English © 2026

hep•ta•chlor n.

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

hepta- + chlor-² 1945–50

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