Source : Webster's Revised Unabridged Dictionary (1913)

Plasmin \Plas"min\, n. (Physiol. Chem.)
   A proteid body, separated by some physiologists from blood
   plasma. It is probably identical with fibrinogen.

Source : WordNet®

plasmin
     n : an enzyme that dissolves the fibrin of blood clots [syn: {fibrinolysin}]