Source : Webster's Revised Unabridged Dictionary (1913)

Grume \Grume\, n. [OF. grume, cf. F. grumeau a little heap, clot
   of blood, dim. fr. L. grumus.]
   A thick, viscid fluid; a clot, as of blood. --Quincy.

Source : WordNet®

grume
     n : a semisolid mass of coagulated red and white blood cells
         [syn: {blood clot}]