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coagulate (verb) (of a liquid) thicken; congeal.
If a liquid turns semisolid, or thickens, it coagulates. For example, dough turns solid on cooling, that is, it coagulates. Tar turns solid on cooling, so it coagulates. The clotting of blood is coagulating. Certain dishes coagulate when they are taken off the oven and allowed to cool.
- The body of Sam, killed in accident, had a number of injuries, with blood coagulating in thick patches around them.
- The blood of the patients of the disease called hemophilia fails to coagulate normally and keeps bleeding even from minor injuries, until it is arrested by some medical process.