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ground water

or groundwater

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
1885-90 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for groundwater

ground water

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 Origin and History for groundwater

"water in the ground," also ground water, 1890, from ground (n.) + water (n.). Attested from mid-15c. in sense "water at the bottom of a stream."

Online Etymology Dictionary, © 2010 Douglas Harper
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groundwater in Science
Water that collects or flows beneath the Earth's surface, filling the porous spaces in soil, sediment, and rocks. Groundwater originates from rain and from melting snow and ice and is the source of water for aquifers, springs, and wells. The upper surface of groundwater is the water table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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groundwater in Culture

groundwater definition

Water that seeps through the soil or rocks underground.

Note: Groundwater is a source of drinking and spring water for many communities.
Note: Groundwater can be contaminated by chemical pollutants. (See water pollution.)
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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