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ground water

or groundwater

noun
1.
the water beneath the surface of the ground, consisting largely of surface water that has seeped down: the source of water in springs and wells.
Origin of ground water
1885-1890
1885-90
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for ground water

ground water

noun
1.
underground water that has come mainly from the seepage of surface water and is held in pervious rocks
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 Value for ground

8
11
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