hyperleukocytosis definition
hyperleukocytosis hyÂ·perÂ·leuÂ·koÂ·cyÂ·toÂ·sis (hÄ«'pÉr-lÅÅ'kÉ-sÄ«-tÅ'sÄ­s) n. An unusually large increase in number and proportion of white blood cells in blood or tissues.