the outer covering of an organ, as of an artery: it is made up chiefly of connective tissue
Origin of adventitiaModern Latin ; from L, for adventicia, neuter plural of adventicius: see adventitious
The membranous outer covering of an organ or a blood vessel.
Origin of adventitiaNew Latin, from Latin advent&imacron;cius, foreign; see adventitious.
From the Latin adventitius (“extraneous”).