Semiconductor

noun

1. Any of various solid crystalline substances, such as germanium or silicon, having electrical conductivity greater than insulators but less than good conductors, and used especially as a base material for computer chips and other electronic devices.
2. An integrated circuit or other electronic component containing a semiconductor as a base material.
3. A substance with electrical properties intermediate between a good conductor and a good insulator.
4. a conductor made with semiconducting material
5. a substance as germanium or silicon whose electrical conductivity is intermediate between that of a metal and an insulator; its conductivity increases with temperature and in the presence of impurities