What is 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 called?

arterial — 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. (Webster's 1913.)

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