Where does “cytophagocytosis” come from?

cytophagocytosis (English) comes from English phagocytosis, from English phagocyte, from French phagocyter, from French -er, from Middle French -er, from Old French -ier — suffix used to form infinitives of first...

Ancestry of “cytophagocytosis”, step by step

StepLanguageWordMeaning
1EnglishphagocytosisA form of endocytosis in which a cell...
2EnglishphagocyteA cell of the immune system, such as a...
3Frenchphagocyterto phagocytize; to swallow up
4French-erForms infinitives of first-conjugation verbs
5Middle French-erForms infinitives of first-conjugation verbs;...
6Old French-iersuffix used to form infinitives of first...
Every word from Old French -ierEvery word from French -erEvery word from Middle French -er