- either of two major veins, formed by the merger of the subclavian and internal jugular veins, that drain blood from the head and arms.
Origin of brachiocephalic vein
First recorded in 1850–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- Either of two veins formed by the union of the internal jugular and subclavian veins. See under left brachiocephalic vein and right brachiocephalic vein.innominate vein