'vesicle' originates from Latin, specifically the word 'vesicula,' which is a diminutive of 'vesica,' meaning 'bladder' or 'blister.'

'Vesicula' in Latin was adopted into Medieval Latin as 'vesicula,' and eventually became the modern English word 'vesicle.'

Initially, it meant 'a small bladder or blister,' but over time it evolved into its current scientific meaning of 'a small fluid-filled sac or cavity in the body or in cells.'