[ fahy-bruh-noid, fib-ruh- ]
/ ˈfaɪ brəˌnɔɪd, ˈfɪb rə- /


having the characteristics of fibrin.


an acellular homogenous protein resembling fibrin, present in the maturing placenta and in certain diseased blood vessels and connective tissues.

Origin of fibrinoid

First recorded in 1905–10; fibrin + -oid Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Medical definitions for fibrinoid

[ fībrə-noid′, fĭbrə- ]


Of or resembling fibrin.


A homogenous acellular material that resembles fibrin and is found in the placenta, forms in connective tissue and in the walls of blood vessels in certain diseases, and is sometimes observed in healing wounds and malignant hypertension.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.