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insulator

/ˈɪn.sjə.leɪ.tə(ɹ)/
noun

  1. A substance that does not transmit heat (thermal insulator), sound (acoustic insulator) or electricity (electrical insulator).

  2. A non-conductive structure, coating or device that does not transmit sound, heat or electricity (see image)

    "To isolate electrical wires from the pylons supporting them, one often uses glass insulators."

  3. A person who installs insulation.

Synonymsinsulant, isolation
Antonymsconductor

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