adventitia

[ ad-ven-tish-ee-uh, -tish-uh ]

/ ˌæd vɛnˈtɪʃ i ə, -ˈtɪʃ ə /

noun Anatomy.

the external covering of an organ or other structure, derived from connective tissue, especially the external covering of a blood vessel.

Nearby words

Origin of adventitia

1875–80; < Latin adventīcia, neuter plural of adventīcius adventitious

Related formsad·ven·ti·tial, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for adventitia

Coincidently with this, there is thickening by a connective tissue growth in the adventitia.
Arteriosclerosis and Hypertension:|Louis Marshall Warfield
There is also, as a rule, rather pronounced hypertrophy of the adventitia.
Arteriosclerosis and Hypertension:|Louis Marshall Warfield
Up to the third decade there is only a strengthening of the media and adventitia.
Arteriosclerosis and Hypertension:|Louis Marshall Warfield
The adventitia varies much in thickness, being better developed in the medium-sized than in the large arteries.
Arteriosclerosis and Hypertension:|Louis Marshall Warfield

British Dictionary definitions for adventitia

adventitia

/ (ˌædvɛnˈtɪʃɪə, -ˈtɪʃə) /

noun

the outermost covering of an organ or part, esp the outer coat of a blood vessel

Word Origin for adventitia

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

Medicine definitions for adventitia

adventitia

[ ăd′vĕn-tĭsh′ə ]

n.

The outermost membranous covering of an organ or structure, especially the outer coat of an artery.