semiconductor
noun /ˌsemikənˈdʌktə(r)/
  /ˈsemikəndʌktər/,  /ˈsemaɪkəndʌktər/
 (specialist)- a solid substance that conducts electricity in particular conditions, better than insulators but not as well as conductorsTopics Engineeringc2
 - a device containing a semiconductor used in electronicsTopics Engineeringc2