What is "cytosis"

n. 1 (context pathology English) An abnormal increase in the number of a specified type of cells 2 (context biology English) The movement of cells between parts of an organism

Cytosis is a transport mechanism for the movement of large quantities of molecules into and out of cells.

There are three main types of cytosis: endocytosis (into the cell), exocytosis (out of the cell), and transcytosis (through the cell, in and out).