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orthophosphoric acid

[awr-thoh-fos-fawr-ik, -for-, awr-] /ˈɔr θoʊ fɒsˈfɔr ɪk, -ˈfɒr-, ˌɔr-/
noun, Chemistry
1.
a colorless, crystalline solid, H 3 PO 4 , the tribasic acid of pentavalent phosphorus: used chiefly in fertilizers, as a source of phosphorus salts, and in soft drinks as an acidulant and flavoring agent.
Origin
1870-1875
1870-75; ortho- + phosphoric acid
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for orthophosphoric acid

orthophosphoric acid

/ˌɔːθəʊfɒsˈfɒrɪk/
noun
1.
a colourless soluble solid tribasic acid used in the manufacture of fertilizers and soaps. Formula: H3PO4 Also called phosphoric acid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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orthophosphoric acid in Medicine

orthophosphoric acid or·tho·phos·phor·ic acid (ôr'thō-fŏs-fôr'ĭk)
n.
See phosphoric acid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for orthophosphoric acid

phosphoric acid

(H3PO4), the most important oxygen acid of phosphorus, used to make phosphate salts for fertilizers. It is also used in dental cements, in the preparation of albumin derivatives, and in the sugar and textile industries. It serves as an acidic, fruitlike flavouring in food products

Learn more about phosphoric acid with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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