2 definitions found
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Seismograph \Seis"mo*graph\, noun [Gr. ??? an earthquake +
An apparatus for registering the shocks and undulatory
motions of earthquakes.
From WordNet (r) 3.0 (2006) [wn]:
1: a measuring instrument for detecting and measuring the
intensity and direction and duration of movements of the
ground (as an earthquake)
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