'amperometer' originates from the combination of 'ampere,' named after the French physicist André-Marie Ampère, and the Greek word 'metron,' meaning 'measure.'

'amperometer' was derived from the term 'ampere meter,' which was used in the early 20th century to describe devices measuring electric current.

Initially, it meant 'a device to measure electric current,' and this meaning has remained consistent in modern usage.