'coagulum' originates from Latin, specifically the word 'coagulum', where 'co-' meant 'together' and 'agere' meant 'to drive'.

'coagulum' has remained largely unchanged from its Latin origins, maintaining its form and meaning in modern English.

Initially, it meant 'a curdling agent or substance', but over time it evolved into its current meaning of 'a thickened mass'.