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[deel-drin] /ˈdil drɪn/
noun, Chemistry.
a light tan, crystalline, water-insoluble, poisonous solid, C 12 H 8 OCl 6 , used as an insecticide: manufacture and use have been discontinued in the U.S.
Origin of dieldrin
First recorded in 1945-50; Diel(s-Al)d(e)r (reaction) + -in2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for dieldrin


a crystalline insoluble substance, consisting of a chlorinated derivative of naphthalene: a contact insecticide the use of which is now restricted as it accumulates in the tissues of animals. Formula: C12H8OCl6
Word Origin
C20: from Diel(s-Al)d(e)r (reaction) + -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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dieldrin in Medicine

dieldrin di·el·drin (dī-ěl'drĭn, dēl'-)
A chlorinated hydrocarbon used as an insecticide and in mothproofing.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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dieldrin in Science
A light tan, toxic, carcinogenic compound used as an insecticide on fruit, soil, and seed, and in controlling tsetse flies and other carriers of tropical diseases. Chemical formula: C12H8Cl6O.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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