1. (a.) Pertaining to a vein or veins\; as, the venous circulation of the blood.

2. (a.) Contained in the veins, or having the same qualities as if contained in the veins, that is, having a dark bluish color and containing an insufficient amount of oxygen so as no longer to be fit for oxygenating the tissues; -- said of the blood, and opposed to arterial.

3. (a.) Marked with veins; veined; as, a venous leaf.

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