[sahy-zuhm, -suhm]
an earthquake.

1880–85; < Greek seismós, equivalent to seis-, stem of seíein to shake, quake + -mos noun suffix; cf. -ism Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
seism (ˈsaɪzəm)
a less common name for earthquake
[C19: from Greek seismos, from seiein to shake]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
Space based early warning system to understand seism tectonics.
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