entry
adventitia
/ˌædvənˈtɪʃə/Outer connective-tissue layer surrounding an organ
From Latin advent (Coming).
Word Ancestry
Latin had a wonderfully physical way of talking about arrival: advenīre meant “to come to,” built from ad-, “to,” and venīre, “to come.” Its noun adventus first described an approach or arrival, and Church Latin gave it a grand religious use—the coming of Christ—which eventually produced Advent, the Christmas season. The medical word adventitia takes the related Latin adjective adventītius, “coming from outside,” and turns it into anatomy: the layer that arrives from the exterior and wraps an organ like a protective coat. The same coming-and-going family still hides in venue, venture, and intervene, all distant cousins of the humble verb “come.” When you remember adventitia, picture an organ with an outsider’s jacket: its name literally says that the covering comes from outside.
The Story
Latin had a wonderfully physical way of talking about arrival: advenīre meant “to come to,” built from ad-, “to,” and venīre, “to come.” Its noun adventus first described an approach or arrival, and Church Latin gave it a grand religious use—the coming of Christ—which eventually produced Advent, the Christmas season. The medical word adventitia takes the related Latin adjective adventītius, “coming from outside,” and turns it into anatomy: the layer that arrives from the exterior and wraps an organ like a protective coat. The same coming-and-going family still hides in venue, venture, and intervene, all distant cousins of the humble verb “come.” When you remember adventitia, picture an organ with an outsider’s jacket: its name literally says that the covering comes from outside.
Kin & Kindred
From 'advent'·Coming, arrival, or something coming from outside
Derived Terms
English words from this root
Sources
Etymonline
Free Dictionary
Wikipedia
Wiktionary