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1. Oxford Dictionary

   polyphosphate

   • IPA[ˌpɒlɪˈfɒsfeɪt]

   英式

   • n.
     a salt or ester of an oxyacid with two or more phosphorus atoms in its anion, especially any of a number used chiefly as detergents or food additives.

   • noun: polyphosphate, plural noun: polyphosphates