a. Anat. [ad. mod.L. brachiocephalicus, f. Gr. βραχίων arm + κεφαλή head; cf. κεφαλικός of or pertaining to the head.] Pertaining to both arm and head: applied chiefly to the blood-vessels common to the arms and head.
1836–9. Todd, Cycl. Anat. & Phys., II. 850/1. The … brachio-cephalic artery. Ibid. (1849–52), IV. 1408/2. This great vein is formed by the union of the two brachio-cephalic veins.
