adventitia

noun

ad·ven·ti·tia ˌad-vən-ˈti-shə

-(ˌ)ven-

: an external chiefly connective tissue covering of an organ

especially : the external coat of a blood vessel

adventitial

ˌad-vən-ˈti-shəl

-(ˌ)ven-

adjective

Word History

Etymology

borrowed from New Latin, alteration of Latin adventīcia, neuter plural of adventīcius "coming from outside, external" — more at adventitious

First Known Use

1854, in the meaning defined above

Time Traveler

The first known use of adventitia was in 1854

See more words from the same year

Cite this Entry

Style

“Adventitia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/adventitia. Accessed 1 Dec. 2024.

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Medical Definition

adventitia

noun

ad·ven·ti·tia ˌad-vən-ˈtish-(ē-)ə

-(ˌ)ven-

: 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

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adventitia

noun

Word History

Dictionary Entries Near adventitia

Cite this Entry

Medical Definition