n. (in pathology) an abnormal outgrowth from a membrane, fancied to resemble a vegetable growth. In ulcerative endocarditis, such outgrowths, consisting of *fibrin with enmeshed blood cells, are found on the membrane lining the heart valves.
Roughenings, comprising FIBRIN and blood cells, that appear upon the valves of the heart, usually as the result of acute RHEUMATISM. They lead in time to narrowing of the openings from the cavities of the heart, or to imcompetence of the valves that close these openings. (See HEART, DISEASES OF.)... vegetations
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