polycythaemia
esp US polycythemia
/ (ˌpɒlɪsaɪˈθiːmɪə) /
noun
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
Word Origin for polycythaemia
C19: from
poly- +
cyto- +
-haemia