'allotransplantation' originates from Greek, specifically the word 'allos,' meaning 'other,' and 'transplantation,' from Latin 'transplantare,' meaning 'to plant across.'

'allos' combined with 'transplantation' to form the modern English word 'allotransplantation.'

Initially, it meant 'transplanting from one to another,' and this meaning has largely remained the same in modern usage.