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aseismic

[ey-sahyz-mik, -sahys-]
adjective Geology.
  1. free from earthquakes.
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Origin of aseismic

First recorded in 1880–85; a-6 + seismic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for aseismic

aseismic

adjective
  1. denoting a region free of earthquakes
  2. (not in technical use) denoting a region free of all but a few small earthquakes
  3. (of buildings, etc) designed to withstand earthquakes
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for aseismic

n.

"resistant to earthquake destruction," 1884, from a- (2) "not" + seismic.

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Online Etymology Dictionary, © 2010 Douglas Harper