'endocellular' originates from Greek, specifically the word 'endon,' where 'endo-' meant 'within,' and Latin 'cellula,' meaning 'small room or cell.'

'endocellular' changed from the combination of Greek and Latin roots and eventually became the modern English word 'endocellular.'

Initially, it meant 'within a small room or cell,' but over time it evolved into its current meaning of 'located or occurring within a cell.'