#oscillator  generator that produces sonic oscillations or alternating current
  supertype:  #generator.electronic_device  an electronic device for producing a signal voltage
  subtype:  #crystal_oscillator__crystaloscillator__quartz_oscillator  an oscillator that produces electrical oscillations at a frequency determined by the physical characteristics of a piezoelectric quartz crystal
  subtype:  #local_oscillator__localoscillator__heterodyne_oscillator  an oscillator whose output heterodynes with the incoming radio signal to produce sum and difference tones

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