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artesian well

noun
1.
a well in which water rises under pressure from a permeable stratum overlaid by impermeable rock.
Origin of artesian well
1855-1860
1855-60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for artesian well

artesian well

/ɑːˈtiːzɪən; -ʒən/
noun
1.
a well sunk through impermeable strata into strata receiving water from an area at a higher altitude than that of the well, so that there is sufficient pressure to force water to flow upwards
Word Origin
C19: from French artésien, from Old French Arteis Artois, old province, where such wells were common
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 artesian well

see artesian

Online Etymology Dictionary, © 2010 Douglas Harper
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artesian well in Science
artesian well
  (är-tē'zhən)   

A deep well that passes through impermeable rock or sediment and reaches water that is held under pressure in a confined aquifer. In aquifers of this type, the water in the lower regions is trapped between two layers of impermeable rock and cannot rise to the level of the water table in the upper, unconfined regions. When a well penetrates the confined region, the pressure forces the water to rise within the well until it reaches the elevation of the water table in the unconfined region (a level known as the potentiometric surface). ◇ In a flowing artesian well the water is under enough pressure to rise all the way to the surface without being pumped and must be capped to control the flow.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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