adventitia

ad·ven·ti·tia (ad′ven tis̸h′ə, -tis̸h′ē ə; --vən-)

noun

the outer covering of an organ, as of an artery: it is made up chiefly of connective tissue

Etymology: ModL < L, for adventicia, neut. pl. of adventicius: see adventitious

Modifies a noun

layer: There is no tunica media or tunica adventitia layer.

Noun used with modifier

tunica: How does the structure of the tunica adventitia differ from that of the muscular artery?

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