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Adventitia


/ˌadvenˈtiSH(ē)ə/

Noun

1. The outermost connective tissue covering of any organ, vessel, or other structure.(wikipedia.org)

2. The outermost layer of epithelial tissue encasing a visceral organ. (wiktionary.org)

3. The outermost connective tissue covering of any organ, vessel, or other structure not covered by a serosa; instead, the covering is properly derived from without (i.e., from the surrounding connective tissue) and does not form an integral part of such organ or structure. (biology-online.org)

4. An enveloping or covering membrane or layer of body tissue. (wordnetweb.princeton.edu)

Syn: tunica adventitia, membrana adventitia, tunica externa.

Word origin: From Latin adventicius, coming from abroad, foreign, fr. Ad, to _ venio, to come

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