vacuum_tube
1. [ noun ] (electronics) electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
Synonyms: tube electron_tube thermionic_tube thermionic_valve thermionic_vacuum_tube
Related terms: electronic_device triode cathode-ray_tube klystron diode X-ray_tube television-camera_tube electron_multiplier acorn_tube tetrode gas-discharge_tube magnetron pentode circuit anode cathode electrode plate grid