diel·​drin | \ˈdēl-drən \

Definition of dieldrin 

: a white crystalline persistent toxic chlorinated compound C12H8Cl6O used especially formerly as an insecticide

Examples of dieldrin in a Sentence

Recent Examples on the Web

Many are also insusceptible to later pesticides like dieldrin, malathion and deltamethrin. Charles C. Mann, WSJ, "‘Silent Spring & Other Writings’ Review: The Right and Wrong of Rachel Carson," 26 Apr. 2018 The environmental assessment found the presence of toxaphene and dieldrin, decades-old insecticides that are now banned and have been shown to cause cancer in mice. Skyler Swisher, Sun-Sentinel.com, "Fire station planned for West Delray, despite environmental concerns and higher cost," 10 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dieldrin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of dieldrin

circa 1949, in the meaning defined above

History and Etymology for dieldrin

Diels-Alder reaction (an addition reaction forming a 6-membered ring), after Otto Diels & Kurt Alder

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The first known use of dieldrin was circa 1949

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diel·​drin | \ˈdē(ə)l-drən \

Medical Definition of dieldrin 

: a white crystalline persistent chlorinated hydrocarbon insecticide C12H8Cl6O

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to enclose within walls

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