verb (used with object), desalinated, desalinating.

1945–50; de- + saline + -ate1

desalination, noun
desalinator, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
desalinate, desalinize or desalinise (diːˈsælɪˌneɪt)
(tr) Also: desalt to remove the salt from (esp from sea water)
desalinize, desalinize or desalinise (diːˈsælɪˌneɪt, diːˈsɔːlt)
desalinise, desalinize or desalinise (diːˈsælɪˌneɪt, diːˈsɔːlt, diːˈsɔːlt)

desalination, desalinization or desalinisation (diːˌsælɪˈneɪʃən)
the process of removing salt, esp from sea water so that it can be used for drinking or irrigation
desalinization, desalinization or desalinisation
desalinisation, desalinization or desalinisation

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1958, from de- + salination (see salt). As a verb, desalt is recorded from 1909.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
desalinization (dē-sāl'ə-nĭ-zā'shən) also desalination   (dē-sāl'ə-nĭ-zā'shən)  Pronunciation Key 

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The removal of salt or other chemicals from something, such as seawater or soil. Desalinization can be achieved by means of evaporation, freezing, reverse osmosis, ion exchange, and electrodialysis.

desalinize verb
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Prospecting trenches crossed the field not far from where the desalination
  plant was going up.
Water will be provided through a solar-powered desalination plant.
Vital facilities line the threatened coast: tanker terminals, refineries, power
  and desalination plants.
Offshore desalination could turn the oceans into an inexhaustible water supply.
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