n :  a clotting factor that is converted to a proteolytic enzyme which converts prothrombin to thrombin in a reaction dependent on calcium ions and other clotting factors - called also Stuart-Prower factor  .
 
 
 
Similar sounding terms:  factor XI  factor IX  factor XIII  factor XII 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2025.