SEISMOGRAPH

seismograph

(noun) a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake)

Source: WordNet® 3.1

Etymology

Noun

seismograph (plural seismographs)

An instrument that automatically detects and records the intensity, direction and duration of earthquakes and similar events.

Source: Wiktionary

Seis"mo*graph, n. Etym: [Gr. -graph.] (Physics)

Definition: An apparatus for registering the shocks and undulatory motions of earthquakes.

Source: Webster’s Unabridged Dictionary 1913 Edition

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