'Medusa' originates from Greek mythology, specifically the name 'Μέδουσα' (Médousa), where 'μέδω' (medo) meant 'to protect' or 'to rule'.

'Μέδουσα' transformed into the Latin word 'Medusa', and eventually became the modern English word 'Medusa'.

Initially, it referred to a protective or ruling figure, but over time it evolved into its current meaning of a mythical creature with petrifying abilities.