atrium plural
a·tri·um
The plural form of atrium is atria
A aDefinitions
- noun plural atrium Architecture. Also called cavaedium. the main or central room of an ancient Roman house, open to the sky at the center and usually having a pool for the collection of rain water. a courtyard, flanked or surrounded by porticoes, in front of an early or medieval Christian church. a skylit central court in a contemporary building or house. 1
- noun plural atrium Anatomy. either of the two upper chambers on each side of the heart that receive blood from the veins and in turn force it into the ventricles. 1