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Related to tunica adventitia: tunica intima, tunica media, Tunica serosa


 (ăd′vĕn-tĭsh′ə, -vən-)
The membranous outer covering of an organ or a blood vessel.

[New Latin, from Latin adventīcius, foreign; see adventitious.]

ad′ven·ti′tial adj.


(ˌædvɛnˈtɪʃɪə; -ˈtɪʃə)
(Anatomy) the outermost covering of an organ or part, esp the outer coat of a blood vessel
[C19: New Latin, from the neuter plural of Latin adventīcius; see adventitious]


(ˌæd vɛnˈtɪʃ i ə, -ˈtɪʃ ə)

n., pl. -ti•as.
the outer tissue layer of an organ, esp. that of a blood vessel.
[1875–80; < Latin adventīcia, neuter pl. of adventīcius adventitious]
ad`ven•ti′tial, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.adventitia - an enveloping or covering membrane or layer of body tissueadventitia - an enveloping or covering membrane or layer of body tissue
tissue layer, membrane - a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants
albuginea - whitish tunic
References in periodicals archive ?
For example, in a patient with a displaced proximal femoral fracture, the tunica adventitia of the femoral artery is not initially injured.
The temporal artery biopsy (TAB) revealed dense mixed inflammatory infiltrate consisting predominantly of lymphocytes and histiocytes involving the tunica adventitia, and the media with an extension into the intima and near complete destruction of external elastic lamina and focal disruption of internal elastic lamina (Figure 2).
External Elastic Lamina (EEL) and Tunica Adventitia (TA) Johnson (2001) stated that the structure of vertebral arteries remained unchanged from its origin through the bony course up to a point 1cm.
Tunica media was separated from intima by internal elastic lamella and it was separated from tunica adventitia by external elastic lamella.
Subsequently ischemic changes caused by the injured vasa vasorum and tunica adventitia fibrosis may induce large vessel rupture and PAP formation.
The external elastic membrane is a layer of elastin that separates the tunica media from the tunica adventitia.
Eosinophilic coronary monoarteritis (ECM) is a rare event characterized by the presence of an inflammatory infiltrate, predominantly of eosinophils, in the tunica adventitia and tunica media of the coronary artery.
Histopathologically all coronary aneurysms involve destruction of the tunica media which is thinned, sometimes markedly, sometimes to the point of no longer being identifiable between the tunica intima and tunica adventitia.
Histologically, a 'Normal' aorta was characterised as having a tunica intima that was relatively thin and loose, with regularly arranged smooth-muscle cells and elastin fibres in the tunica media, and a loosely organised tunica adventitia.