NONCONDUCTOR

nonconductor. Nonconductor, n. a substance which does not transmit another substance, especially electricity

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Non′con‐duct″or (?), n. (Physics) A substance which does not conduct, that is, convey or transmit, heat, electricity, sound, vibration, or the like, or which transmits them with difficulty; an insulator; as, wool is a nonconductor of heat; glass and dry wood are nonconductors of electricity.