Literally meaning: “state of most cells”
Origin: Anc Greek
πλέον or πλείον/pleon or pleion(=more, the comparative of πολύς/polys=much)
+cyte (=combining form meaning “cell” derived from anc Greek word κυτίον/cytion (=box, container)
+(-ωσις/-osis(=(=suffix denoting process or state)
Pleiocytosis is presence of a greater than normal number of cells, as lymphocytes, in cerebrospinal fluid.