dielectric

noun

1. a material such as glass or porcelain with negligible electrical or thermal conductivity
   Terjemahkan ke Indonesia sumber: wordnet30
2. Any substance or medium that transmits the electric force by a process different from conduction, as in the phenomena of induction; a nonconductor. separating a body electrified by induction, from the electrifying body.
   Terjemahkan ke Indonesia sumber: webster1913