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Medical Definition of Megalocythemia
1. The occurrence of unusually large numbers of macrocytes in the circulating blood. Synonym: macrocytosis, megalocythemia, megalocytosis. Origin: macrocyte + G. Haima, blood Hyperchromatic macrocythemia, an inexact term frequently used for macrocytes that contain an unusually large amount of haemoglobin, but are actually normochromic; although the total mass of haemoglobin is greater than normal (owing to the large cells), the percentage of haemoglobin in the cells is not greater than normal. (05 Mar 2000)
Lexicographical Neighbors of Megalocythemia
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