Coagulate \Co*ag"u*late\, a. [L. coagulatus, p. p. of coagulare to coagulate, fr. coagulum means of coagulation, fr. cogere, coactum, to drive together, coagulate. See {Cogent}.] Coagulated. [Obs.] --Shak.
Coagulate \Co*ag"u*late\, v. t. [imp. & p. p. {Coagulated}; p. pr. & vb. n. {Coagulating}.] To cause (a liquid) to change into a curdlike or semisolid state, not by evaporation but by some kind of chemical reaction; to curdle; as, rennet coagulates milk; heat coagulates the white of an egg.
Coagulate \Co*ag"u*late\, v. i. To undergo coagulation. --Boyle.
Syn: To thicken; concrete; curdle; clot; congeal.
The officials said the large amounts of blood given the emperor to replace that lost from bleeding had reduced his blood's ability to coagulate and made it more difficult to stop the hemorrhaging.