noun Biochemistry.
  1. a proteolytic enzyme, formed in the blood from plasminogen, that causes the breakdown of the fibrin in blood clots.

Origin of fibrinolysin

First recorded in 1910–15; fibrino- + lysin
Also called plasmin. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

fibrinolysin in Medicine


  1. plasmin
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.