Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The membranous outer covering of an organ or a blood vessel.

from The Century Dictionary.

  • noun In anatomy, any membranous structure covering an organ but not properly belonging to it (in full, membrana adventitia, adventitious membrane); specifically, the outermost of the three coats of a blood-vessel (in full, tunica adventitia, adventitious tunic), consisting of connective tissue.

from the GNU version of the Collaborative International Dictionary of English.

  • noun the membranous outer covering of an organ or blood vessel.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun anatomy, histology The outermost layer of epithelial tissue encasing a visceral organ.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun an enveloping or covering membrane or layer of body tissue

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

From the Latin adventitius ("extraneous").

Examples

  • Figure 5.2 Moving Through The artery has three layers—the inner to help blood move through the artery (intima), the outer (adventitia) to protect it from the outside, plus a middle, muscular layer (media).

    You: On a Diet

  • Figure 5.2 Moving Through The artery has three layers—the inner to help blood move through the artery (intima), the outer (adventitia) to protect it from the outside, plus a middle, muscular layer (media).

    You: On a Diet

  • Figure 5.2 Moving Through The artery has three layers—the inner to help blood move through the artery (intima), the outer (adventitia) to protect it from the outside, plus a middle, muscular layer (media).

    You: On a Diet

  • Outer layer: The outer layer the adventitia shields the artery from the rest of your body like sausage casing; it holds the artery together from the outside.

    You: On a Diet

  • Outer layer: The outer layer the adventitia shields the artery from the rest of your body like sausage casing; it holds the artery together from the outside.

    You: On a Diet

  • Outer layer: The outer layer the adventitia shields the artery from the rest of your body like sausage casing; it holds the artery together from the outside.

    You: On a Diet

  • This thickening was mainly produced by an augmentation of the connective tissue of the adventitia and of the intima.

    Alexis Carrel - Nobel Lecture

  • The histological examination showed a large increase of the connective tissue of the adventitia and of the connective tissue of the intima, but the muscular fibres were normal.

    Alexis Carrel - Nobel Lecture

  • This network forms an adventitia to the bloodvessels.

    XI. Splanchnology. 4c. The Thymus

  • This latter is composed of a few circular unstriped muscle cells a. The adventitia, similar in structure to that of an artery.

    Illustrations. Fig. 448

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