pleocytosis

noun
pleo·​cy·​to·​sis | \ ˌplē-ō-ˌsī-ˈtō-səs How to pronounce pleocytosis (audio) \
plural pleocytoses\ -​ˌsēz How to pronounce pleocytoses (audio) \

Medical Definition of pleocytosis

: an abnormal increase in the number of cells (as lymphocytes) in the cerebrospinal fluid

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