WordNet: dielectric, insulator, nonconductor

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

• hypernym material, stuff

• hyponym bushing

• hyponym mineral wool, rock wool

• hyponym glass wool

dielectric

• (suomi) dielektrinen aine (synonyymi)

insulator

• (englanti) conductor (antonym)

• (englanti) insulate (derivationally related)
• (suomi) eriste (synonyymi)

nonconductor

• (suomi) eristin (synonyymi)