(plural vacuum tubes)
- (electronics) An electrical device containing a heated filament inside an evacuated container (generally a glass tube) and used to produce rectification (a diode vacuum tube), amplification or other functions.
vacuum tube - Computer Definition
An electronic device that controls the flow of electrons in a vacuum. It is used as a switch, amplifier or display screen. Used as on/off switches, they allowed the first computers to perform digital computations. Although vacuum tubes have made a comeback in high-end stereo components, most vacuum tubes today are the picture tubes (CRTs) in monitors and TVs. See vacuum tube types and audiophile.