INSULATOR

Pronunciation (US): (GB):

Meaning:

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

Synonyms:

dielectric; insulator; nonconductor

Classified under:

Nouns denoting substances

Hypernyms ("insulator" is a kind of...):

material; stuff (the tangible substance that goes into the makeup of a physical object)

Hyponyms (each of the following is a kind of "insulator"):

bushing (an insulating liner in an opening through which conductors pass)

mineral wool; rock wool (a light fibrous material used as an insulator)

glass wool (glass fibers spun and massed into bundles resembling wool)

Antonym:

conductor (a substance that readily conducts e.g. electricity and heat)

Derivation:

insulate (protect from heat, cold, or noise by surrounding with insulating material)