/ Dictionary / Index D dieldrin: Meaning and Definition of Find definitions for: diel•drin Pronunciation: (dēl'drin), [key] — n. Chem. a light tan, crystalline, water-insoluble, poisonous solid, CHOCl, used as an insecticide: manufacture and use have been discontinued in the U.S. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diel dielectric Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language