不ふ良りょう導どう体たい

noun

insulator; nonconductor; poor conductor

Physics/engineering term for a material that does not readily conduct electricity or heat. Often contrasted with 良導体 (good conductor).

• ゴムは不ふ良りょう導どう体たいなので、電でん気きを通とおしにくい。

  Rubber is an insulator, so it does not conduct electricity easily.

• この素そ材ざいは熱ねつの不ふ良りょう導どう体たいとして使つかわれる。

  This material is used as a poor conductor of heat.