2,3-diphosphoglycerate
noun
2,3-di·phos·pho·glyc·er·ate
variants:
also diphosphoglycerate \ (ˌtü-ˌthrē-)ˌdī-ˌfäs-fō-ˈglis-ə-ˌrāt 
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Medical Definition of 2,3-diphosphoglycerate
: an isomeric ester of diphosphoglyceric acid that occurs in human red blood cells and facilitates release of oxygen by decreasing the oxygen affinity of hemoglobin