dielectric
adjective/ˌdaɪəˈlɛktrɪk/
Frequency rank: #13,152 most common English word
Meaning
A non-conducting substance that can support an electric field without conducting current.

Example sentence
The engineer chose glass as the dielectric material between the capacitor plates.
Synonyms & related words
- insulating
- nonconducting
- nonconductive
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