seismometer

[sahyz-mom-i-ter, sahys-]
noun
a seismograph equipped for measuring the direction, intensity, and duration of earthquakes by measuring the actual movement of the ground.

Origin:
1835–45; seismo- + -meter

seismometric [sahyz-muh-me-trik, sahys-] , seismometrical, adjective
seismometry, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
seismometer   (sīz-mŏm'ĭ-tər)  Pronunciation Key 
A detecting device that receives seismic impulses. It is the detecting component of a seismograph. See more at seismograph.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The wiggle trace measures the vertical movement the seismometer experiences
  from the seismic waves.
List of seismometer parameters used to calculate complex impedance.
Description of photograph showing a student transporting a seismometer.
The metal frame is used to keep things from bumping up against the seismometer
  while it is in operation.
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