the external covering of an organ or other structure, derived from connective tissue, especially the external covering of a blood vessel.
the outermost covering of an organ or part, esp the outer coat of a blood vessel
adventitial ad·ven·ti·tial (ād’věn-tĭsh’əl, -vən-)
Of or relating to the adventitia of an organ or blood vessel.
adventitia ad·ven·ti·tia (ād’věn-tĭsh’ə, -vən-)
The outermost membranous covering of an organ or structure, especially the outer coat of an artery.
- Adventitial cell
adventitial cell adventitial cell n. See pericyte.
- Adventitial neuritis
adventitial neuritis adventitial neuritis n. Inflammation of the sheath of a nerve.
associated with something by chance rather than as an integral part; extrinsic. Botany, Zoology. appearing in an abnormal or unusual position or place, as a root. Historical Examples Such acknowledgments are of high value in keeping the issue clear, if not always of all adventitious, yet of all venomous matter. The Works of Robert G. […]
- Adventitious cyst
adventitious cyst adventitious cyst n. See pseudocyst.