English word exocytotoxic comes from English cytotoxic, English exo- (Outside, external.)

Detailed word origin of exocytotoxic

Dictionary entry	Language	Definition
cytotoxic	English (eng)	Any cytotoxic substance; a cytotoxin. Of or relating to cytotoxicity.. Of, relating to, or being a cytotoxin.
exo-	English (eng)	Outside, external.
exocytotoxic	English (eng)	Cytotoxic outside of the cell that produced the cytotoxin.

Words with the same origin as exocytotoxic