arterial blood n 1: blood found in arteries; "except for the pulmonary artery the arterial blood is rich in oxygen"
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. [1913 Webster] 2. Of or pertaining to a main channel (resembling an artery), as a river, canal, or railroad. [1913 Webster] {Arterial blood}, blood which has been changed and vitalized (arterialized) during passage through the lungs. [1913 Webster]