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iso·cit·ric acid .ī-sə-.si-trik- n a crystalline isomer of citric acid that occurs esp. as an intermediate stage in the Krebs cycle
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iso·cit·ric ac·id (i″so-sitґrik) a structural isomer of citric acid, that is an intermediate in the citric (tricarboxylic) acid cycle (q.v.).Medical dictionary. 2011.