seism

[sahy-zuhm, -suhm]
noun
an earthquake.

Origin:
1880–85; < Greek seismós, equivalent to seis-, stem of seíein to shake, quake + -mos noun suffix; cf. -ism

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World English Dictionary
seism (ˈsaɪzəm)
 
n
a less common name for earthquake
 
[C19: from Greek seismos, from seiein to shake]

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Example sentences
Space based early warning system to understand seism tectonics.
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