Semiconductor
/ˌsɛmɪkənˈdʌktər/
noun … “Material with controllable electrical conductivity.”
Semiconductor is a material whose electrical conductivity lies between that of a conductor and an insulator. Its conductivity can be modified by adding impurities (doping), applying voltage, or controlling temperature. Semiconductors are the foundation of modern electronics, enabling the creation of transistors, logic gates, diodes, integrated circuits, microprocessors, and memory devices.