Coagulation is the process by which blood forms clots. Coagulation may also refer to: Coagulation (water treatment), in colloid chemistry, a process in which dispersed colloidal particles agglomerate Coagulation (milk), the coagulation of milk into curd by rennet or acid Coagulation, the loss of solubility as a result of denaturation Blood Gulch, a multiplayer map called "Coagulation" in the video game Halo 2 Mixing of two particles in an aerosol to form a third particle Clumping of dust particles in a protoplanetary disk, a possible early stage of planet formation