Seismograph

//ˈsaɪz.mə.ɡɹæf// noun

Definitions

Noun
  1. 1
    An instrument that automatically detects and records the intensity, direction and duration of earthquakes and similar events.
  2. 2
    a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake) wordnet

Etymology

From seismo- + -graph.

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