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seismic

adjective
 
 
/ˈsaɪz.mɪk/

Definition

[before noun] relating to or caused by an earthquake: seismic activity/wavesEarthquakes and volcanic eruptions having very great and damaging effects: The news that the chairman would resign set off seismic waves in the business community.Damaging and spoilingDestroying and demolishing
(Definition of seismic adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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