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Noun: seismograph  'sIz-mu`grãf
  1. A measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake)
    "the seismograph showed a sharp spike in response to the temblor"
    - seismometer

Derived forms: seismographs

Type of: measuring device, measuring instrument, measuring system

Encyclopedia: Seismograph

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