insulator

  1. Noun.  A substance that does not transmit heat (''thermal insulator''), sound (''acoustic insulator'') or electricity (''electrical insulator'').
  2. Noun.  Image:Ceramic electric insulator.jpg|100px|right|insulator A non-conductive structure, coating or device that does not transmit sound, heat or electricity (see image).

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This entry was last updated on RefTopia from its source on 3/20/2012.