dielectric
die·lect·ric
noun
1.
a material such as glass or porcelain with negligible electrical or thermal conductivity
Origin
From dia- (“through”) + electric. Learned 19th-century formation, coined by William Whewell (died 1866).
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.