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[jee-uh-fohn] /ˈdʒi əˌfoʊn/
a device that is placed on or in the ground and used to detect seismic waves.
Origin of geophone
First recorded in 1915-20; geo- + -phone Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for geophone
Historical Examples
  • There was a tense five minutes as the geophone expert listened.

    The Boy With the U.S. Miners Francis Rolt-Wheeler
  • The geophone expert was at his bedside, waiting impatiently.

    The Boy With the U.S. Miners Francis Rolt-Wheeler
  • "That's what the geophone man heard," Owens commented to the reporter.

    The Boy With the U.S. Miners Francis Rolt-Wheeler
  • "The vibrodyne machine isn't running," he remarked finally after repeated adjustments of the geophone.

    The Social Gangster Arthur B. Reeve
  • Nothing at all of any value was being recorded by the geophone when Kennedy glanced quickly at his watch.

    The Social Gangster Arthur B. Reeve
  • We entered our bare little room and Kennedy set to work as though to detach the geophone, while I explained it to our client.

    The Social Gangster Arthur B. Reeve
  • The first geophone used by the western powers in the war was invented by the French.

  • If the enemy were burrowing in the ground anywhere within a distance of 75 yards the geophone would tell about it.

  • At breakfast time, Thursday morning, just at the change of shift, the geophone expert reported voices.

    The Boy With the U.S. Miners Francis Rolt-Wheeler
geophone in Science
An electronic receiver designed to pick up seismic vibrations on or below the Earth's surface and to convert them into electric impulses that are proportional to the displacement, velocity, and acceleration of ground movement. Geophones detect motion in only one direction and are usually used in groups of at least three, oriented at different angles, so that a three-dimensional record of ground movement can be obtained.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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