what is the insulator
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A material or device used to prevent heat, electricity or sound from escaping from something
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a substance which does not readily allow the passage of heat or sound.
"cotton is a poor insulator"
a substance or device which does not readily conduct electricity.
"a series of electrodes separated by insulators"
a block of glass, ceramic, or other insulating material enclosing a wire carrying an electric current where it crosses a support
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