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cyclodiene

[sahy-kluh-dahy-een, -dahy-een]
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noun Chemistry.
  1. any of several organic chemicals having a chlorinated methylene group bonded to two carbon atoms of a 6-membered carbon ring, used commercially in insecticides.
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Origin of cyclodiene

First recorded in 1940–45; cyclo- + diene
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018