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[dahy-i-lek-trik] /ˌdaɪ ɪˈlɛk trɪk/ Electricity
a nonconducting substance; insulator.
a substance in which an electric field can be maintained with a minimum loss of power.
of or relating to a dielectric substance.
Origin of dielectric
1830-40; di-3 + electric
Related forms
dielectrically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for dielectric
  • The device consists of a membrane composed of layers of metal and dielectric insulator, with a pore of few nanometers diameter.
  • The whole color component of the screen is a three-layer all-metal dielectric stack.
  • High voltage cables are typically insulated with special water-resistant polymers that have high-dielectric strength.
  • The second is whether there are structures in the body with the required dielectric properties to be susceptible.
  • High-voltage transformers contain oil as their insulating dielectric.
  • The properties of dielectric control some electrical properties of the cable.
British Dictionary definitions for dielectric


a substance or medium that can sustain a static electric field within it
a substance or body of very low electrical conductivity; insulator
of, concerned with, or having the properties of a dielectric
Derived Forms
dielectrically, adverb
Word Origin
from dia- + electric
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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dielectric in Science
Adjective  Having little or no ability to conduct electricity, generally as a result of having no electrons that are free to move.

Noun  A dielectric substance, especially one used in a capacitor to maintain an electric field between the plates.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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dielectric in Culture
dielectric [(deye-i-lek-trik)]

A material that conducts (see conduction) electricity poorly or not at all. If a voltage is applied to a dielectric, the atoms in the material arrange themselves in such a way as to oppose the flow of electric current. Glass, wood, and plastic are common dielectrics. (See insulator.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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