Nonconductor
Pronunciation : Non`con*duct"or
Part of Speech : n.
Definition : Defn: 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.
(Physics)
Source : Webster's Unabridged Dictionary, 1913