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seawater

[see-waw-ter, -wot-er] /ˈsiˌwɔ tər, -ˌwɒt ər/
noun
1.
the salt water in or from the sea.
Origin
1000
before 1000; Middle English see water, Old English sǣwæter; see sea, water
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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sea-water in Science
seawater
  (sē'wô'tər)   
Salt water, normally with a salinity of 35 parts per thousand (3.5%), in or coming from the sea or ocean. Although seawater contains more than 70 elements, most seawater salts are ions of six major elements: chloride, sodium, sulfate, magnesium, calcium, and potassium. The major sources of these salts are underwater volcanic eruptions, chemical reactions involving volcanic matter, and chemical weathering of rocks on the coasts. Seawater is believed to have had the same salinity for billions of years.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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