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microseism

American  
[mahy-kruh-sahy-zuhm, -suhm] / ˈmaɪ krəˌsaɪ zəm, -səm /

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.

microseism British  
/ ˌmaɪkrəʊˈsaɪzmɪk, ˈmaɪkrəʊˌsaɪzəm /

noun

  1. a very slight tremor of the earth's surface, thought not to be caused by an earthquake

"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 Scientific  
/ mī′krə-sī′zəm /

  1. A faint Earth tremor, unrelated to earthquakes, caused by natural phenomena, such as winds and strong ocean waves.

Other Word Forms

  • microseismic adjective
  • microseismical adjective

Etymology

Origin of microseism

First recorded in 1885–90; micro- + seism

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.