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Medical Term:

cyclic phosphoric acid


  1. in general, a linear polymer of phosphoric acid residues in pyrophosphate linkage in which the a and ? residues are similarly linked to make one endless loop or cyclic compound;
  2. specifically, a generic term applied to compounds in which one phosphoric acid residue is esterified to two hydroxyl groups of a single carbon chain, as in adenosine 3',5'-phosphoric acid or adenosine 2',3'-phosphoric acid.
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