| an increase in the number of white blood cells in the blood. |
leukocytosis leu·ko·cy·to·sis or leu·co·cy·to·sis (l&oomacr;'kə-sī-tō'sĭs)
n. pl. leu·ko·cy·to·ses (-sēz)
An abnormally large increase in the number of white blood cells in the blood, often occurring during an acute infection or inflammation.