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chlorothalonil

American  
[klawr-uh-thal-uh-nil, klohr-] / ˌklɔr əˈθæl ə nɪl, ˌkloʊr- /

noun

Chemistry.

  1. a crystalline compound, C 8 Cl 4 N 2, used as a fungicide on vegetable crops, peanuts, and lawns, and as a preservative in adhesives and paints.

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.