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phosphoric acid

noun, Chemistry
1.
any of three acids, orthophosphoric acid, H 3 PO 4 , metaphosphoric acid, HPO 3 , or pyrophosphoric acid, H 4 P 2 O 7 , derived from phosphorus pentoxide, P 2 O 5 , and various amounts of water.
Origin
1785-1795
1785-95
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for phosphoric acid
  • Wet process phosphoric acid is used in fertilizer production.
  • Aluminum hydroxide and phosphoric acid were the inorganic precursors.
British Dictionary definitions for phosphoric acid

phosphoric acid

noun
1.
Also called orthophosphoric acid. a colourless solid tribasic acid used in the manufacture of fertilizers and soap. Formula: H3PO4 Systematic name phosphoric(V) acid
2.
any oxyacid of phosphorus produced by reaction between phosphorus pentoxide and water See also metaphosphoric acid, pyrophosphoric acid, hypophosphoric 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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phosphoric acid in Medicine

phosphoric acid phos·phor·ic acid (fŏs-fôr'ĭk)
n.
A clear colorless liquid used in pharmaceuticals. Also called orthophosphoric 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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phosphoric acid in Science
phosphoric acid
  (fŏs-fôr'ĭk)   
A clear liquid, or a solid that forms colorless, rhombus-shaped crystals, that is used in fertilizers, detergents, food flavoring, and pharmaceuticals. Chemical formula: H3PO4.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for 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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