[ 'eɪtrɪəm ]
■ noun ( plural atria 'eɪtrɪə or ~s )
1》 Architecture an open-roofed central court in an ancient Roman house.
↘a central hall or court in a modern building, typically rising through several stories and having a glazed roof.
2》 Anatomy each of the two upper cavities of the heart from which blood is passed to the ventricles.
Derivatives
atrial adjective
Origin
C16: from L.