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pentachloronitrobenzene

[pen-tuh-klawr-oh-nahy-troh-ben-zeen, -ben-zeen, -klohr-]
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noun Chemistry.
  1. a crystalline compound, C6Cl5NO2, used as an herbicide and insecticide. Abbreviation: PCNB
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Origin of pentachloronitrobenzene

Also called terrachlor.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018