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Definition of Fibrinoid
1. [n -S]
Medical Definition of Fibrinoid
1. 1. Resembling fibrin. 2. A deeply or brilliantly acidophilic, homogeneous, refractile, proteinaceous material that: 1) is frequently formed in the walls of blood vessels and in connective tissue of patients with such diseases as disseminated lupus erythematosus, polyarteritis nodosa, scleroderma, dermatomyositis, and rheumatic fever; 2) is sometimes observed in healing wounds, chronic peptic ulcers, the placenta, necrotic arterioles of malignant hypertension, and other unrelated conditions. Origin: fibrin + G. Eidos, resemblance (05 Mar 2000)