polycythemia definition, polycythemia meaning | English dictionary

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,   (esp. U.S.)   polycythemia         
      n   an abnormal condition of the blood characterized by an increase in the number of red blood cells. It can occur as a primary disease of unknown cause (polycythaemia vera or erythraemia) or in association with respiratory or circulatory diseases  
     (C19: from poly- + cyto- + -haemia)  
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