insulator

Noun
Synonyms: dielectricnonconductor

WordNet 3.0

Noun (1)

  1. a material such as glass or porcelain with negligible electrical or thermal conductivitySynonyms: dielectricnonconductor
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Webster's Dictionary (GCIDE)

Insulator \In"su*la`tor\, n.

1.One who, or that which, insulates. [1913 Webster]

2.(Elec. & Thermotics) A substance or object that insulates; a nonconductor; as, polyurethane foam is a popular thermal insulator. [1913 Webster +PJC]

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