Ar·te·ri·al a.
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.
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arterial blood
n : blood found in arteries; "except for the pulmonary artery
the arterial blood is rich in oxygen"