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subduction

[suh b-duhk-shuh n] /səbˈdʌk ʃən/
noun
1.
an act or instance of subducting; subtraction or withdrawal.
2.
Geology. the process by which collision of the earth's crustal plates results in one plate's being drawn down or overridden by another, localized along the juncture (subduction zone) of two plates.
Origin
1570-1580
1570-80; < Latin subductiōn-, stem of subductiō pulling up, computation; see subduct, -ion
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for subduction zone
  • Since this occurs at same depth along the subduction zone a chain of volcanoes develops.
  • The location where sinking of a plate occurs is called a subduction zone.
  • Evidence for past great earthquakes on the subduction zone is extensive.
  • Schematic diagram of a subduction zone, showing the location of the outer rise and tensional stresses within the subducting plate.
British Dictionary definitions for subduction zone

subduction zone

noun
1.
(geology) a long narrow, often arcuate, zone along which subduction takes place

subduction

/səbˈdʌkʃən/
noun
1.
the act of subducting, esp of turning the eye downwards
2.
(geology) the process of one tectonic plate sliding under another, resulting in tensions and faulting in the earth's crust, with earthquakes and volcanic eruptions
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
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Word Origin and History for subduction zone

subduction

n.

early 15c., "withdrawal, removal" (originally of noxious substances from the body), from Latin subductionem (nominative subductio), noun of action from past participle stem of subducere (see subduce). Geological sense is attested from 1970, from French (1951).

Online Etymology Dictionary, © 2010 Douglas Harper
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subduction zone in Science
subduction zone  
A convergent plate boundary where one plate subducts beneath the other, usually because it is denser. The western coast of South America is roughly coincident with a subduction zone in which a plate consisting of ocean floor is subducting beneath the continental mass of South America.
subduction
  (səb-dŭk'shən)   
A geologic process in which one edge of one lithospheric plate is forced below the edge of another. The denser of the two plates sinks beneath the other. As it descends, the plate often generates seismic and volcanic activity (from melting and upward migration of magma) in the overriding plate. Compare obduction.

subduct verb
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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