What is the meaning of Seismometer?

(n.) An instrument for measuring the direction, duration, and force of earthquakes and like concussions.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). seismometer. Retrieved September 20, 2026, from http://smartdefine.org/seismometer/definitions/2059835
ChicagoWebster's. 2011. "seismometer" http://smartdefine.org/seismometer/definitions/2059835 (accessed September 20, 2026).
HarvardWebster's 2011, seismometer, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/seismometer/definitions/2059835>.
MLAWebster's. "seismometer" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/seismometer/definitions/2059835>