Vacuum tube

Definition of Vacuum tube

(Phys.)	a glass tube provided with platinum electrodes and exhausted, for the passage of the electrical discharge; a Geissler tube.
	any tube used in electronic devices, containing a vacuum and used to control the flow of electrons in a circuit, as a vacuum diode, triode, tetrode, or pentode.

See also: Vacuum Vacuum

Related Words

acorn tube, anode, cathode, circuit, control grid, diode, electric circuit, electrical circuit, electrode, electron multiplier, electron tube, electronic device, gas-discharge tube, grid, klystron, magnetron, pentode, plate, rectifying tube, rectifying valve, television pickup tube, television-camera tube, tetrode, thermionic tube, thermionic vacuum tube, thermionic valve, triode, tube, X-ray tube

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