'aphid' originates from New Latin, specifically the word 'aphid-' (from Late Latin/Neo-Latin formation related to 'Aphididae'), where the Greek word 'aphis' meant 'plant louse'.

'aphid' changed from the Greek word 'aphis' through Late/Neo-Latin forms such as 'Aphididae' and the New Latin stem 'aphid-', and eventually became the modern English word 'aphid'.

Initially, it meant 'plant louse', but over time it evolved into its current meaning of 'small sap-sucking insect of the Aphidoidea'.