Large veins on either side of the root of the neck formed by the junction of the internal jugular and subclavian veins. They drain blood from the head, neck, and upper extremities, and unite to form the superior vena cava.

Synonyms: Brachiocephalic Vein, Brachiocephalic Veins, Vein, Innominate, Veins, Innominate, Innominate Veins, Veins, Brachiocephalic, Innominate Vein, Vein, Brachiocephalic