The complex process by which liquid blood transforms into a solid clot to stop bleeding. This involves platelets and a cascade of clotting factors working together to form fibrin strands.
From Latin 'coagulare' meaning 'to curdle,' from 'cogere' (to drive together). The term originally described milk curdling but was applied to blood clotting in the 17th century, reflecting the similar transformation from liquid to solid.
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