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Definition of Metaphosphoric acid
1. Noun. A glassy solid acid ([HPO3]n) often used as a dehydrating agent.
Generic synonyms: Polyphosphoric Acid
Medical Definition of Metaphosphoric acid
1. An anhydride of phosphoric acid used as a reagent, and in the manufacture of zinc oxyphosphate cement for dentistry. Synonym: metaphosphoric acid. (05 Mar 2000)