An entry chamber. On both sides of the heart, the atrium is the chamber that leads to the ventricle.

The superior chamber in an animal's heart.

1570s, from Latin atrium "central court or main room of an ancient Roman house, room which contains the hearth," sometimes said (on authority of Varro, "De Lingua Latina") to be an [..]

The upper chambers of the heart, composed of the left and right atria.

(plural: atria) upper chamber of the heart that receives blood from veins and forces it into a ventricle (lower chamber).

Large and well-lit open space within a structure

Atrium (Latin) the central court of a Roman houseExample 1: Gardens in Pompeian frescoes, Example 2: Monastery Garden Plans, Example 3: Gardens in the Roman Provinces

An interior area that provides plenty of light for plants, often skylighted. Many homes have built in atriums.

A central hall or open court within a structure.

(a´tre-um) Either of the two superior chambers of the heart that receive venous blood. atrophy

One of the chambers of the heart; also, the tympanic cavity of the ear; also, the large cavity containing the pharynx in tunicates and cephalochordates. auricle

n. in anatomy, this refers to a body cavity or chamber, for example, the two upper chambers of the heart.

part of the heart (pop)

One of two small upper receiving chambers of the heart; plural form is "atria."

The open roofed entrance court of a building.

A new feature on cruise ships that is a multi-story space.

  The central rectangular, interior open-air hall of the Etruscan and Roman house, usually considered the most important room.

(n) any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)(n) the central area in a building; open to the sky

One of the two upper chambers of the heart.

One of the heart's two upper chambers (the plural form is atria). The right atrium receives deoxygenated blood from the body; the left atrium receives oxygenated blood from the lungs.

There are four chambers in the heart, two on the right side pumping to the lungs, and two on the left side pumping to the body. On each side there is an upper, low-pressure chamber that collects blood [..]

A central hall or open court within a structure.

the colonnaded forecourt on the west side of an early Christian church, originally the open central forecourt of a Roman house.

The chambers of the Heart, to which the Blood returns from the circulation.

A malformation of the Heart in which the embryonic common Pulmonary Vein was not incorporated into the LEFT ATRIUM leaving behind a perforated fibromuscular Membrane bisecting the left atrium, a three [..]

The upper chamber of the heart that receives blood from the veins and pushes it into the ventricle.

Any chamber or cavity at the entrance or a body opening; in Musca domestica larva, the preoral cavity.

Chamber or room-like area.

An upper heart chamber.

(architecture) A central room or space in ancient Roman homes, open to the sky in the middle; a similar space in other buildings. (architecture) A square hall lit by daylight from above, into whic [..]

atrium (square hall) Atriumhaus (building)

one of two upper chambers in the heart.

The two smaller chambers (one on each side) of the heart; the right atrium accepts blood from the veins throughout the body and the left atrium accepts freshly oxygenated blood from the lungs