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A syrupy liquid formed by the dehydration of phosphoric acid; its salts, the pyrophosphates, are used in medicine.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
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Meaning relationships
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The acid formed by removing a molecule of water from two molecules of phosphoric acid, H4P2O7; this reaction slowly reverses in the presence of water.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
Topics: chemistry, inorganic-chemistry, natural-sciences, physical-sciences
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a solid acid formed by reactions of orthophosphoric acid
Definition source: Princeton WordNet 3.0
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Antonyms: none provided
Broader terms: polyphosphoric acid
From pyro- + phosphoric acid.