dielectric

dielectric /di″elek′trik/ , 1. adj., transmitting electric effects by induction, but not by conduction. The term is applied to an insulating substance through or across which electric force is acting or may act by induction without conduction. 2. n., an insulating substance that transmits in this way, i.e., through or across which electric force is acting or may act by induction without conduction.