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Medical Definition of Physiologic leukocytosis
1. Any form of leukocytosis that is associated with apparently normal situations and that is not directly related to a pathologic condition; e.g., the temporary increase in the total number of white blood cells that may occur during a single day, or from day to day, as well as in the newborn period, during childhood, after strenuous exercise, during attacks of paroxysmal tachycardia, and in association with various other situations. (05 Mar 2000)