vegetation

1. The process of growth in plants. 2. A condition of sluggishness, comparable to the inactivity of plant life. 3. A growth or excrescence of any sort. 4. Specifically, a clot, composed largely of fused blood platelets, fibrin, and sometimes microorganisms, adherent to a diseased heart orifice or valve, and often initiated by infection of the structures involved. [Mod. L. vegetatio, growth]
- bacterial vegetations lesions of bacterial endocarditis that form anywhere on the endocardium but preferentially on higher pressure and injured areas and particularly valves. They may also appear on arterial intima and in a patent ductus arteriosus and other areas of shunt inside and outside the heart.
- verrucous vegetations wart-like vegetations sometimes due to endocarditis, also related to degenerative changes on the valves and amyloidosis.

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veg·e·ta·tion .vej-ə-'tā-shən n an abnormal outgrowth upon a body part specif any of the warty excrescences on the valves of the heart that are composed of various tissue elements including fibrin and collagen and that are typical of endocarditis

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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.

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veg·e·ta·tion (vej″ə-taґshən) [L. vegetatio] any plantlike fungoid neoplasm or growth; a luxuriant fungus-like growth of pathologic tissue.

Medical dictionary. 2011.

Synonyms:

Look at other dictionaries:

  • Vegetation — Vegetation …   Deutsch Wörterbuch

  • VÉGÉTATION — Dans les divers pays, le langage a toujours distingué certains types de végétation. On n’a pas besoin de connaître le nom des plantes pour parler de forêt, de lande, de maquis, de savane, de steppe, de pelouse. Étudier la végétation revient à… …   Encyclopédie Universelle

  • Vegetation — Végétation La végétation est l ensemble des plantes (la flore) sauvages ou cultivées qui poussent sur une surface donnée de sol, ou dans un milieu aquatique. On parle aussi de couverture végétale . La végétation, avec les champignons, auxquels… …   Wikipédia en Français

  • Vegetation — Veg e*ta tion, n. [Cf. F. v[ e]g[ e]tation, L. vegetatio an enlivening. See {Vegetable}.] [1913 Webster] 1. The act or process of vegetating, or growing as a plant does; vegetable growth. [1913 Webster] 2. The sum of vegetable life; vegetables or …   The Collaborative International Dictionary of English

  • vegetation — 1560s, act of vegetating, from M.Fr. végétation, from M.L. vegetationem (nom. vegetatio) a quickening, action of growing, from vegetare grow, quicken (see VEGETABLE (Cf. vegetable)). Meaning plant life first recorded 1727 …   Etymology dictionary

  • vegetation — Vegetation. s. f. v. Action de vegeter. La vegetation des plantes & des metaux …   Dictionnaire de l'Académie française

  • Vegetation — (v. lat.), 1) Pflanzenleben, s.u. Pflanzen; 2) das niedere, ernährende u. bildende Leben des thierischen Körpers, s. Vegetatives Leben; 3) krankhafte Bildung, Wucherung, Excrescenz; 4) metallische V., s. Metallvegetation …   Pierer's Universal-Lexikon

  • Vegetation — (lat.), das Wachstum der Pflanze; auch die Gesamtheit der Pflanzen einer Gegend oder eines Landes (s. Pflanzengeographie); endlich der Abschnitt des Pflanzenlebens, in dem die Entwickelung der sogen. vegetativen, d. h. für die Ernährung und das… …   Meyers Großes Konversations-Lexikon

  • Vegetation — (lat.), Leben und Wachstum der Pflanzen …   Kleines Konversations-Lexikon

  • vegetation — index inaction, inertia, languor Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • Vegetation — Vegetation, Gesamtheit aller Pflanzengesellschaften eines Gebiets …   Deutsch wörterbuch der biologie

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