SYN: glacial phosphoric acid.
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meta·phos·pho·ric acid .met-ə-.fäs-.fȯr-ik-, -.fär-; -.fäs-f(ə-)rik- n a glassy solid acid HPO3 or (HPO3)n formed by heating orthophosphoric acid but usu. obtained in the form of salts
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meta·phos·phor·ic ac·id (met″ə-fos-forґik) a glassy solid polymer of phosphoric acid, soluble in water; used as a reagent for chemical analysis and as a test for albumin in the urine. Called also glacial phosphoric acid.Medical dictionary. 2011.