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adventitia

[ad-ven-tish-ee-uh, -tish-uh] /ˌæd vɛnˈtɪʃ i ə, -ˈtɪʃ ə/
noun, Anatomy
1.
the external covering of an organ or other structure, derived from connective tissue, especially the external covering of a blood vessel.
Origin
1875-1880
1875-80; < Latin adventīcia, neuter plural of adventīcius adventitious
Related forms
adventitial, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for adventitias

adventitia

/ˌædvɛnˈtɪʃɪə; -ˈtɪʃə/
noun
1.
the outermost covering of an organ or part, esp the outer coat of a blood vessel
Word Origin
C19: New Latin, from the neuter plural of Latin adventīcius; see adventitious
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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adventitias in Medicine

adventitia ad·ven·ti·tia (ād'věn-tĭsh'ə, -vən-)
n.
The outermost membranous covering of an organ or structure, especially the outer coat of an artery.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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