Arterial \Ar*te"ri*al\, a. [Cf. F. art['e]riel.]

1. Of or pertaining to an artery, or the arteries; as, arterial action; the arterial system.

2. Of or pertaining to a main channel (resembling an artery), as a river, canal, or railroad.

Arterial blood, blood which has been changed and vitalized (arterialized) during passage through the lungs.

Source: Webster's Revised Unabridged Dictionary (1913)