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microseism

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(mī′krō sīz′əm)

noun

a very slight tremor or quivering of the earth's crust that is not related to an earthquake, usually caused by an atmospheric disturbance

Origin: < micro- + Gr seismos: see seismic

Related Forms:

microseismic adjective

See microseism in American Heritage Dictionary 4

noun

A faint earth tremor caused by natural phenomena, such as winds and strong ocean waves.

Related Forms:

miˌcro·seisˈmic (-sīzˈmĭk, -sīsˈ-) adjective

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