noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The outermost layer of epithelial tissue encasing a visceral organ. countable, uncountable
2. 2
   an enveloping or covering membrane or layer of body tissue wordnet

Synonyms

All synonyms

tunictunictunica

Etymology

From the Latin adventitius (“extraneous”).

Related phrases

adventitia bonatunica adventitia

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.