Noun: atrium (atriums,atria) ey-tree-um
- The central area in a building; open to the sky
"The hotel's glass-roofed atrium filled the space with natural light"
- Any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)
"The left atrium receives oxygenated blood from the lungs"
Derived forms: atria, atriums
Type of: chamber, court, courtyard
Part of: heart, pump, ticker [informal]
Encyclopedia: Atrium, Cardiff