phosphate

[fos-feyt]
noun
1.
Chemistry.
a.
(loosely) a salt or ester of phosphoric acid.
b.
a tertiary salt of orthophosphoric acid, as sodium phosphate.
2.
Agriculture. a fertilizing material containing compounds of phosphorus.
3.
a carbonated drink of water and fruit syrup containing a little phosphoric acid.

Origin:
1785–95; phosph- + -ate2

subphosphate, noun
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World English Dictionary
phosphate (ˈfɒsfeɪt)
 
n
1.  any salt or ester of any phosphoric acid, esp a salt of orthophosphoric acid
2.  (often plural) any of several chemical fertilizers containing phosphorous compounds
 
[C18: from French phosphat; see phosphorus,-ate1]
 
phosphatic
 
adj

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Etymonline
Word Origin & History

phosphate
1795, from Fr. phosphate (1787), from phosphore (see phosphorous).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

phosphate phos·phate (fŏs'fāt')
n.
A salt or an ester of phosphoric acid. adj.
Containing the trivalent radical PO4.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
phosphate   (fŏs'fāt')  Pronunciation Key 
A salt or ester of phosphoric acid, containing the group PO4. Phosphates are important in metabolism and are frequently used in fertilizers.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
But the country is already a big importer of phosphates and especially potash.
In addition, tri-aryl phosphates are suspected neurotoxins.
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