#thermionic_vacuum_tube__tube__vacuum_tube__thermionic_tube__electron_tube__thermionic_valve  electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  supertype:  electronic_device  a device that accomplishes its purpose electronically
  subtype:  acorn_tube  diode  electron_multiplier  gas-discharge_tube  klystron  magnetron  pentode  television-camera_tube  tetrode  triode  X-ray_tube
  part:  anode  cathode  electrode  control_grid  plate.anode
  part of:  electrical_circuit__circuit__electric_circuit  an electrical device that provides a path for electrical current to flow
     part of:  electronic_equipment  equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor)

No statement uses or specializes thermionic_vacuum_tube; click here to add one.