adventitia
noun
ad·​ven·​ti·​tia
| \ ˌad-vən-ˈti-shə
, -(ˌ)ven-\
, -(ˌ)ven-\
Definition of adventitia
: an external chiefly connective tissue covering of an organ
especially
: the external coat of a blood vessel
Other Words from adventitia
adventitial
\ -​shəl
\
adjective
\
adjective
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More Definitions for adventitia
adventitia
noun
ad·​ven·​ti·​tia
| \ ˌad-vən-ˈtish-(ē-)ə
, -(ˌ)ven-
\
, -(ˌ)ven-
\
Medical Definition of adventitia
: the outer layer that makes up a tubular organ or structure and especially a blood vessel, is composed of collagenous and elastic fibers, and is not covered with peritoneum
— called also tunica adventitia, tunica externa