Seawater meaning

sēwôtər, -wŏtər
The salt water in or coming from the sea or ocean.
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The salty water of the ocean.
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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.
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The saltwater of a sea or ocean.
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Origin of seawater

  • From Middle English seewater, from Old English sÇ£wæter (“seawater"), equivalent to sea +"Ž water. Cognate with Dutch zeewater (“seawater").

    From Wiktionary