| either of two major veins, formed by the merger of the subclavian and internal jugular veins, that drain blood from the head and arms. |
| brachiocephalic vein n. See innominate vein. |
| innominate vein n. Either of a pair of veins in the neck, each formed by the union of the internal jugular and subclavian veins, that join to form the superior vena cava. Also called brachiocephalic vein. |
brachiocephalic vein n.
Either of two veins formed by the union of the internal jugular and subclavian veins. See under left brachiocephalic vein and right brachiocephalic vein. Also called innominate vein.