fi'brin

[L. fibra, fiber.] An elastic filamentous protein derived from fibrinogen by the action ofthron:- bin; the active agent in coagulation of the blood, glu'ten f., a protein resembling animal f., found in various grains. Hen'le*s f., a substance resembling the f. of the blood, precipitated from the seminal fluid on the addition of water, veg'etable f., gluten f.