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Noun. 1. blood coagulation-a process in which liquid blood is changed into a semisolid mass (a blood clot). blood clotting. clotting, coagulation, curdling-the process of forming semisolid lumps in a liquid.1  Facebook.oun. 1. blood coagulation-a process in which liquid blood is changed into a semisolid mass (a blood clot). blood clotting. clotting, coagulation, curdling-the process of forming semisolid lumps in a liquid.
Coagulation tests measure your bloodâs ability to clot, and how long it takes to clot. Testing can help your doctor assess your risk of excessive bleeding or developing clots (thrombosis) somewhere in your blood vessels. Learn more: Bleeding disorders Â» Coagulation tests are similar to most blood tests. Side effects and risks are minimal.