noun \ˈsē-ˌw-tər, -ˌwä-\

: water in or from the sea

Full Definition of SEAWATER

:  water in or from the sea

First Known Use of SEAWATER

before 12th century


noun    (Concise Encyclopedia)

Water that makes up the oceans and seas. Seawater is a complex mixture of 96.5% water, 2.5% salts, and small amounts of other substances. Much of the world's magnesium is recovered from seawater, as are large quantities of bromine. In certain parts of the world, sodium chloride (table salt) is obtained by evaporating seawater. In addition, desalted seawater can theoretically furnish a limitless supply of drinking water, but the high processing costs are prohibitive. Large desalination plants have been built in dry areas along seacoasts in the Middle East and elsewhere to relieve shortages of fresh water.


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