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insulator

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insulator/ˈɪnsəˌleɪtɚ ˈɪnsjʊˌleɪtə/noun
pluralinsulators
insulator
/ˈɪnsəˌleɪtɚ ˈɪnsjʊˌleɪtə/
noun
pluralinsulators
Learner's definition of INSULATOR  
[count]
: a material that allows little or no heat, electricity, or sound to go into or out of something
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