Definition of PolycythemiaPolycythemia: Too many red blood cells. The opposite of anemia. polycythemia formally exists when the hemoglobin, red blood cell (RBC) count, and total RBC volume are all above normal. Last Editorial Review: 4/27/2011 5:27:15 PM Back to MedTerms online medical dictionary A-Z List Need help identifying pills and medications? |
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