#Roman house
- Atrium — Each of the two upper chambers of the heart (left and right) that receive blood from the veins and pump it into the ventricles; in architecture, a central interior courtyard of an ancient Roman dwelling, often open in the ceiling, or a large, high, glazed central space in modern buildings.
- Atrium — An unadapted form or architectural neologism often used as a variant for 'atriu'; the central open space of an ancient Roman house (domus), surrounded by rooms, having a central basin (impluvium) for collecting rainwater. In contemporary structural design, it describes a glass-covered interior courtyard located at the center of hotel complexes, office buildings, or large museums.