#electricity  a physical phenomenon associated with stationary or moving electrons and protons
  supertype:  #physical_phenomenon  a natural phenomenon involving the physics of matter and energy
  subtype:  #galvanism  electricity produced by chemical action
  subtype:  #hydroelectricity  electricity produced by water power
  subtype:  #piezoelectricity__piezoelectric_effect__piezoelectriceffect__piezo_effect__piezoeffect  electricity produced by mechanical pressure on certain crystals (notably quartz or Rochelle salt); alternatively, electrostatic stress produces a change in the linear dimensions of the crystal
  subtype:  #static_electricity  electricity produced by friction
  subtype:  #dynamic_electricity__dynamicelectricity__current_electricity__currentelectricity  a flow of electric charge
  subtype:  #thermoelectricity  electricity produced by heat (as in a thermocouple)

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