Desalination

n. process of removing salt (usually from sea water)

Desalination, desalinization, or desalinisation refer to any of several processes that remove excess salt and other minerals from water. Desalination may also refer to the removal of salts and minerals more generally, as in soil desalination, but the focus of this article is on water desalination.Water is desalinated in order to obtain fresh water suitable for animal consumption or irrigation, or, if almost all of the salt is removed, for human consumption. Sometimes the process produces table salt as a by-product. It is used on many ships and submarines. Most of the modern interest in desalination is focused on developing cost-effective ways of providing fresh water for human use in regions where the availability of water is limited.
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Noun
1. the removal of salt (especially from sea water)
(synonym) desalinization, desalinisation
(hypernym) chemical process, chemical change, chemical action
(derivation) desalinate, desalt, desalinize, desalinise

[Desalinization] (1) Removing salts from ocean or brackish water by using various technologies. (2) Removal of salts from soil by artificial means, usually leaching.

 Say it 
Removal of dissolved salts from seawater.