This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A material that conducts little or no electricity, heat, or sound.

n. any material that does not conduct electricity; a dielectric

n. 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

n. A substance which does not conduct or transmit a particular form of energy (specifically, heat or electricity), or which transmits it with difficulty: thus, wool is a non-conductor of heat; glass and dry wood are non-conductors of electricity. See conductor, 6, electricity, and heat.

n. a material such as glass or porcelain with negligible electrical or thermal conductivity

"For he knew, as true men did not, that water, flowing water, was a nonconductor of distorts and illusions."

stuff    material   

bushing    glass wool    rock wool    mineral wool   

insulator   

lightshow    l'echelle    megawatts    coulomb    zing    kwh    measurer    conductress    motorman    secretary-treasurer