from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The frequency or magnitude of earthquake activity in a given area.

from The Century Dictionary.

  • noun The ratio between the number of earthquakes in a region and the area of the region.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun factor of how seismic a region is. How prone it is to earthquakes.


Sorry, no etymologies found.



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