#magnet  a device that attracts iron and produces a magnetic field
  supertype:  #device  an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"
  subtype:  #bar_magnet  #electromagnet  #field_magnet  #magnetic_needle  #paramagnet  #permanent_magnet  #solenoid
  part:  #core.bar  a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil
  part:  #magnetic_pole.end__magneticpole__pole  one of the two ends of a magnet where the magnetism seems to be concentrated

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