polycythemia
【待翻译】pol-e-si-THE-me-ah
释义：Any condition in which there is a relative increase in the percent of red blood cells in whole blood; may result from excessive production of red cells because of oxygen lack, as caused by high altitudes, breathing obstruction, heart failure, or certain forms of poisoning. Apparent polycythemia results from concentration of the blood, as by dehydration (FIG. 11-15)