noun
brachiocephalic trunk
Anatomical term for the first major branch of the aortic arch, supplying blood to the right arm and the head and neck.
腕頭動脈は大動脈弓から最初に分岐する太い血管です。
The brachiocephalic trunk is the first large vessel branching from the aortic arch.
Compound of 腕頭 (brachiocephalic, from 腕 'arm' and 頭 'head') and 動脈 (artery). The term is a direct anatomical borrowing from Western medicine.