the.com/coagulation

means The process by which a liquid, especially blood, thickens and clumps into a semi-solid mass.

from From Latin coagulare, 'to curdle or cause to clot,' built from co- ('together') and agere ('to drive, to do') — the same agere that gives us 'act' and 'agent.' The Romans used it for curdling milk into cheese long before it meant stopping a wound; the word itself describes particles being driven together into one mass, whether in a cheese vat or a vein.