Semiconductor

[Oralee]

A solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits.

[Michiko]

a material, such as silicon, that allows electricity to move through it more easily when its temperature increases, or an electronic device made from this material: