The presence of an abnormally high number of red blood cells in the circulating blood. SYN: hypererythrocythemia. [hyper- + G. kytos, cell, + haima, blood]

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hy·per·cy·the·mia or chiefly Brit hy·per·cy·thae·mia -sī-'thē-mē-ə n the presence of an excess of red blood cells in the blood: polycythemia
hy·per·cy·the·mic or chiefly Brit hy·per·cy·thae·mic -'thē-mik adj

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hy·per·cy·the·mia (hi″pər-si-theґme-ə) polycythemia.

Medical dictionary. 2011.

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  • Polycythemia — The presence of too many red blood cells. Polycythemia formally exists when the hemoglobin, red blood cell (RBC) count and total RBC volume are both above normal. For example, the percentage of red blood cells in whole blood (hematocrit) in… …   Medical dictionary

  • hypererythrocythemia — SYN: hypercythemia. * * * hy·per·eryth·ro·cy·the·mia (hi″pər ə rith″ro si theґme ə) polycythemia …   Medical dictionary

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