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microseism

[mahy-kruh-sahy-zuh m, -suh m]
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noun Geology.
  1. a feeble, recurrent vibration of the ground recorded by seismographs and believed to be due to an earthquake or a storm at sea.
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Origin of microseism

First recorded in 1885–90; micro- + seism
Related formsmi·cro·seis·mic, mi·cro·seis·mi·cal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

upheavalshocktemblorundulationseismslipfaultquakeshakeconvulsionmovementmicroseismtremblerquakerseismism
British Dictionary definitions for microseism

microseism

noun
  1. a very slight tremor of the earth's surface, thought not to be caused by an earthquake
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Derived Formsmicroseismic (ˌmaɪkrəʊˈsaɪzmɪk) or microseismical, adjective
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
microseism in Science

microseism

[mī′krə-sī′zəm]
  1. A faint Earth tremor, unrelated to earthquakes, caused by natural phenomena, such as winds and strong ocean waves.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.