vacuum tube |
| noun - (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.
| | valve |
| noun
- A device that controls the flow of a gas or fluid through a pipe.
- A device that admits fuel and air into the cylinder of an internal combustion engine, or one that allows combustion gases to exit.
- (context, anatomy) A structure in the heart that controls the direction of the flow of the blood.
- A vacuum tube.
| varactor |
| noun
- (electronics) A solid-state diode whose capacitance varies with the applied voltage.
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