atrium: Meaning and Definition of
Pronunciation: (ā'trē-um), [key]
— pl. a•tri•a a•tri•ums.
- Also calledcavaedium.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. See diag. underbasilica.
- a skylit central court in a contemporary building or house.
- 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. See illus. under
- atrium (Thesaurus)