Metaphosphoric-acid meaning

mĕt'ə-fŏs-fôr'ĭk
A colorless glassy polymeric phosphoric acid, (HPO3 )n , that is highly deliquescent and forms phosphoric acid upon addition of water, used as a dehydrating agent, phosphorylating agent, and in dental cements.
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Glacial phosphoric acid, HPO3, a deliquescent solid obtained by heating orthophosphoric acid: used as an analytical reagent.
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(chemistry) An anhydrous form of phosphoric acid that exists as a polymeric glassy solid, (HPO3)n; used as a drying agent and in dental cement.
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