sea·wa·ter

[see-waw-ter, -wot-er]
noun
the salt water in or from the sea.

Origin:
before 1000; Middle English see water, Old English sǣwæter; see sea, water

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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American Heritage
Science Dictionary
seawater   (sē'wô'tər)  Pronunciation Key 
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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00:10
Seawater is always a great word to know.
So is callithumpian. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Example sentences
Warm seawater, taken from close to the surface, is pumped so that it trickles
  down these units.
Drinking too much seawater can cause violent episodes of diarrhea and vomiting
  in dogs.
The pumping of seawater into the boiling-water reactor design will cause more
  problems even if the cool down is successful.
There, nutrients and contaminants that have dissolved in freshwater encounter
  the ionized salts of seawater.
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