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from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of, subject to, or caused by an earthquake or earth vibration.
  • adj. Earthshaking: an issue of seismic proportions and ramifications.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Related to, or caused by an earthquake or other vibration of the Earth.
  • adj. Of very large, or widespread effect.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to an earthquake; caused by an earthquake.

from The Century Dictionary and Cyclopedia

  • Pertaining to or of the nature of an earthquake; relating to or connected with an earthquake, or with earthquakes in general.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. subject to or caused by an earthquake or earth vibration


Based on Ancient Greek σεισμός (seismos, "shaking, earthquake") + -ic. (Wiktionary)



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  • 'heard', not 'read', I said (leave it to TV to fossilize terms into the incorrect domain).

    though I suspect there's a bit of kooky femlit out there mentioning 'mother earth's seismic orgasm'

    June 5, 2009

  • I still read it more often in relation to plate tectonics. Perhaps I'm reading the wrong matter.

    June 5, 2009

  • heard these days more often than not in the vicinity of orgasm

    June 5, 2009