at ‧ ri ‧ um /ˈeɪtriəm/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: Latin ]
1 . a large high open space in a tall building
2 . one of the two spaces in the top of your heart that push blood into the ↑ ventricle s
at ‧ ri ‧ um /ˈeɪtriəm/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: Latin ]
1 . a large high open space in a tall building
2 . one of the two spaces in the top of your heart that push blood into the ↑ ventricle s
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012