atrium
noun [ C ] uk/ˈeɪ.tri.əm/ us/ˈeɪ.tri.əm/ atria or atriums
(ROOM)
（尤指大商店或办公楼的）中庭，天井
a very large room, often with glass walls or roof, especially in the middle of a large shop or office building
(HEART)
anatomy specialized (also auricle)心房
one of the two spaces at the top part of the heart that receive blood from the veins and push it down into the ventricles (= lower spaces)