'embolus' originates from Greek, specifically the word 'embolos,' where 'em-' meant 'in' and 'ballein' meant 'to throw.'

'embolos' transformed into the Latin word 'embolus,' and eventually became the modern English word 'embolus.'

Initially, it meant 'a stopper or plug,' but over time it evolved into its current medical meaning of 'a blockage in a blood vessel.'