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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.

phosphoric acid

noun

  1. Also calledorthophosphoric acid a colourless solid tribasic acid used in the manufacture of fertilizers and soap. Formula: H 3 PO 4 Systematic namephosphoric(V) acid
  2. any oxyacid of phosphorus produced by reaction between phosphorus pentoxide and water See also metaphosphoric acid pyrophosphoric acid hypophosphoric acid

phosphoric acid

/ fŏs-fôr′ĭk /

  1. A clear liquid, or a solid that forms colorless, rhombus-shaped crystals, that is used in fertilizers, detergents, food flavoring, and pharmaceuticals. Chemical formula: H 3 PO 4 .

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Word History and Origins

Origin of phosphoric acid1

First recorded in 1785–95

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