What is the meaning of Atrium?

A central room or space in ancient Roman homes, open to the sky in the middle; a similar space in other buildings.

A square hall lit by daylight from above, into which rooms open at one or more levels.

A cavity, entrance, or passage.

Any enclosed body cavity or chamber.

An upper chamber of the heart that receives blood from the veins and forces it into a ventricle. In higher vertebrates, the right atrium receives blood from the superior vena cava and inferior vena cava, and the left atrium receives blood from the left and right pulmonary veins.

A microscopic air sac within a pulmonary alveolus.

A cavity inside a porate aperture of a pollen grain formed by the separation of the sexine and nexine layers, widening toward the interior of the grain.

Romanization of 𐌀𐌕𐌓𐌉𐌖𐌌

an atrium

an atrium

atrium (central room in Roman homes)

atrium (square hall lit from above)

atrium

atrium:

a central room or space in ancient Roman homes, open to the sky in the middle; a similar space in other buildings.

cavity, entrance, or passage.

one of two upper chambers of the heart.

a welcoming room in a Roman villa; reception hall, main court

a hall, court in a temple

atrium (a square hall lit by daylight from above, into which rooms open at one or more levels)

atrium (a central room or space in ancient Roman homes, open to the sky in the middle; a similar space in other buildings)

atrium (one of two upper chambers of the heart)

atrium

Source: wiktionary.org