factor I


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Noun1.factor I - a protein present in blood plasma; converts to fibrin when blood clots
clotting factor, coagulation factor - any of the factors in the blood whose actions are essential for blood coagulation
References in classic literature ?
Another factor is the circumstance that even when, overjoyed at winning, the Grandmother was distributing alms right and left, and taking every one to be a beggar, she again snapped out to the General that he was not going to be allowed any of her money-- which meant that the old lady had quite made up her mind on the point, and was sure of it.