Definition of Atrium

1. Noun. Any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart).

Generic synonyms: Chamber
Specialized synonyms: Atrium Cordis, Atrium Of The Heart
Derivative terms: Atrial

2. Noun. The central area in a building; open to the sky.
Generic synonyms: Court, Courtyard

Definition of Atrium

1. n. A square hall lighted from above, into which rooms open at one or more levels.

2. n. A cavity, entrance, or passage; as, the atrium, or atrial cavity, in the body wall of the amphioxus; an atrium of the infundibula of the lungs, etc.

Definition of Atrium

1. Noun. (architecture) A central room or space in ancient Roman homes, open to the sky in the middle; a similar space in other buildings. ¹

2. Noun. (architecture) A square hall lit by daylight from above, into which rooms open at one or more levels. ¹

3. Noun. (anatomy) Any enclosed body cavity or chamber ¹

4. Noun. (anatomy) 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. ¹

5. Noun. (anatomy) A microscopic air sac within a pulmonary alveolus. ¹

6. Noun. (palynology) 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. ¹

¹ Source: wiktionary.com

Definition of Atrium

1. the main room of an ancient Roman house [n ATRIA or ATRIUMS]

Medical Definition of Atrium

1. A chamber, used in anatomical nomenclature to designate a chamber affording entrance to another structure or organ. Usually used alone to designate an atrium of the heart. Origin: L., Gr. Atrion = hall (16 Dec 1997)

Lexicographical Neighbors of Atrium

atrioventricular junctional bigeminy
atrioventricular junctional rhythm
atrioventricular junctional tachycardia
atrioventricular nodal branch
atrioventricular nodal extrasystole
atrioventricular nodal rhythm
atrioventricular node
atrioventricular septum
atrioventricular sulcus
atrioventricular trunk
atrioventricular valve
atrioventricular valves
atrip
atriplicism
atrist
atrium cordis
atrium dextrum
atrium dextrum cordis
atrium glottidis
atrium meatus medii
atrium of heart
atrium of the heart
atrium pulmonale
atrium sinistrum
atrium sinistrum cordis
atriums
atrocha
atrochae
atrocious

Literary usage of Atrium

Below you will find example usage of this term as found in modern and/or classical literature:

1. Anatomy, Descriptive and Applied by Henry Gray (1913)
"The coronary sinus opens into the atrium, between the orifice of the inferior vena cava and the atrioventricular opening. It returns blood from the ..."

2. A Dictionary of Greek and Roman Antiquitiesby William George Smith, Charles Anthon by William George Smith, Charles Anthon (1870)
"The atrium was the most important room in the •we, and among the wealthy was ... The marble columns of Scaurus already spoken of were •heed in the atrium. ..."

3. Monuments of the Early Church by Walter Lowrie (1906)
"This was known by various names, in the West most commonly as the atrium or ... The atrium was an almost invariable feature of the early basilicas in the ..."

4. Harper's Dictionary of Classical Literature and Antiquities by Harry Thurston Peck (1897)
"As the atrium now became the reception-room, it was fitted up among tlio wealthy ... The rooms which opened out of the atrium were lighted only through the ..."

5. The Ruins and Excavations of Ancient Rome: A Companion Book for Students and by Rodolfo Amedeo Lanciani (1897)
"The most prominent feature of the building is the atrium; in fact, its size and magnificence were so great that the whole building was named from it, ..."

6. John Amos Comenius: Bishop of the Moravians : His Life and Educational Works by Simon Somerville Laurie, Charles William Bardeen (1892)
"The third Latin book was called the atrium, and this was to effect the ... The text of the atrium follows the same line as the Janua, but indulges in a ..."

7. Gallus: Or, Roman Scenes of the Time of Augustus. With Notes and Excursuses by Wilhelm Adolf Becker (1849)
"The basin in the atrium was generally of an oblong shape, without further ornament. Virgil, ^En. ii. 612, doubtless alludes to the atria of his times. ..."

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