adjective \ˈsīz-mik, ˈsīs-\

: of, relating to, or caused by an earthquake

: very great or important

Full Definition of SEISMIC

:  of, subject to, or caused by an earthquake; also :  of or relating to an earth vibration caused by something else (as an explosion or the impact of a meteorite)
:  of or relating to a vibration on a celestial body (as the moon) comparable to a seismic event on earth
:  having a strong or widespread impact :  earthshaking <seismic social changes>
seis·mi·cal·ly \-mi-k(ə-)lē\ adverb

Examples of SEISMIC

  1. Seismic social changes have occurred.

Origin of SEISMIC

Greek seismos shock, earthquake, from seiein to shake; probably akin to Avestan thwaēshō fear
First Known Use: 1858

Other Geology Terms

anthracite, boulder, cwm, erratic, igneous, intrusive, mesa, sedimentary, silt, swale


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