Also found in: Thesaurus, Medical, Encyclopedia.


 (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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


of or relating to the adventitia
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.adventitial - of or pertaining to the adventitiaadventitial - of or pertaining to the adventitia  
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The trachea, as well as the tracheal bronchi and main bronchi of boto and tucuxi, presented elastic fibers in its fibrous adventitial tunica (Fig.
Moreover, the human vascular adventitial fibroblasts from pulmonary arteries, were cultured in appropriate media and showed osteogenic, adipogenic and myogenic differentiation (13).
Medical technology company Mercator MedSystems Inc stated on Wednesday that it has admitted the first patient under the TANGO (Temsirolimus Adventitial Delivery to Improve Angiographic Outcomes Below the Knee) clinical trial.
For all IVUS images, the intima and media to adventitial (MA) borders were manually traced by two independent experts twice within a month of one another.
The role is in part related to their presence as adventitial reticular cells that participate in normal wound repair and in regulation of hematopoietic cells in bone marrow [31].
It is widely known that advancing age is an important risk factor for BRVO since the main pathogenic mechanism of BRVO is arterial stiffness that causes venous compression in the common adventitial sheath [2, 47].
(v) Along the adventitial plane of SMA, the MP is dissected and removed "step-by-step," from the SMA origin until its entrance into the mesentery, using progressive exposure and gentle medial retraction of the portal vein, which is also freed from the MP.
Cystic adventitial disease (CAD) is rare vascular disorder in which a mucinous cystic formation in the adventitial layer of artery disturbs the arterial blood flow and causes intermittent claudication in young-adult patient.
These two proteins are known to show increased expression on the intimal side of the atherosclerotic plague endothelia but not the adventitial side [43].
Gao, "Different biomechanical properties of medial and adventitial layers of thoracic aorta in Wistar-Kyoto and spontaneously hypertensive rats," Acta Pharmacologica Sinica, vol.
The adventitial tissue is dissected until the vessels are separated.
During development, one or few of these cells lose their ability to produce or secrete platelet derived growth factor (PDGF) and transforming growth factor beta 1 (TGF a1), (Marx) which are required to recruit adventitial cells around developing vessels.