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light water

noun
1.
ordinary water, as opposed to heavy water; water containing the normal proportion of deuterium oxide.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for light water

light water

noun
1.
a name for water (H2O), as distinct from heavy water
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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light water in Science
light water  
Ordinary water, H2O. Compare heavy water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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