noun
coronary sinus
Anatomical term for the large vein on the posterior of the heart that collects blood from the myocardium.
冠状静脈洞は心臓の後面にある太い静脈です。
The coronary sinus is a large vein on the posterior surface of the heart.
Compound of 冠状 (coronary) + 静脈 (vein) + 洞 (sinus), a direct anatomical term.