adventitial

9.9

On the outer layer of an organ or blood vessel

adjective
/ˌæd.vənˈtɪʃ.əl/

Specialized

: adventicio

The surgeon noted that the adventitial covering had thickened around the artery.

Examples

C=Positive fibroblasts (black arrows) located in the adventitial layer from an intermediate-sized vein.

Academic text (2000)
The distance between the near/far MA walls constitutes the IAD (inter-adventitial distance).

Academic text (2016)
The adventitial layer of the blood vessel provides support and protection.
In this study, the adventitial tissue was examined for inflammation.

Surface Forms

adventitial positive

Morphology

adventitial = adventitia (transparent) = adventitia + ial

Formed by adding the adjectival suffix '-ial' to the noun 'adventitia', so the adjective directly denotes 'relating to the adventitia'.

Etymology

Adventitial comes from Latin words meaning 'coming from outside', with the parts ad- 'to' and venire 'to come', and it is related to familiar words like advent and adventure. So adventitial names the outer layer of an organ or vessel — the part that 'comes' from the outside.