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atrium

[ey-tree-uhm]

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noun, plural a·tri·a

[ey-tree-uh] , a·tri·ums.

Architecture.

Also called cavaedium. 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.

a skylit central court in a contemporary building or house.

Anatomy. 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.

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Origin:
1570–80; < Latin (in anatomical sense < NL)

Related forms

a·tri·al, adjective

in·ter·a·tri·al, adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To atrium

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Atrium is always a great word to know.

So is podium. Does it mean:

a low wall forming a base for a construction, as a colonnade or dome; the masonry supporting a classical temple

an upwardly curved construction, as of steel or timber functioning in the manner of a masonry arch; a door or gateway with a curved head

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Example Sentences

The older buildings, all accessible from here, anchor three corners of the atrium.

Walk in the door and into the sunlit atrium and look up.

The lesson: tenants prize a short walk to lunch more highly than an award-winning atrium.

EXPAND

The older buildings, all accessible from here, anchor three corners of the atrium.

Walk in the door and into the sunlit atrium and look up.

The lesson: tenants prize a short walk to lunch more highly than an award-winning atrium.

Flip the atrium grate over and insert it in the hole.

The venules combine into larger and larger veins until they feed into the right atrium of the heart as the vena cava.

And chalkboards are everywhere, even in the outdoor atrium.

The museum's cafe spills through a wall into the atrium that connects the new structure to an existing technology center.

He has also placed his father's ashes in the gallery's spectacular atrium.

The upper chamber on each side is called the atrium.

Picture the lobby atrium of a new, green building, one filled with leafy plants and trees.

Several floors' worth of concrete will be removed to create an atrium.

We were shooting a commercial in the atrium of a building, where a small football field is.

Linking all the spaces together is a five-level atrium.

Up a hand-hewn ladder is the roof, a flat mud surface with the atrium cut from the middle.

Walk catwalks in central atrium to your room: floor-to-ceiling windows, sepia artwork, eco-friendly soap dispensers.

Its flat facade conceals a soaring interior of internal walkways around an atrium.

The blood then flows to the left atrium and down to the left ventricle, which pumps it out again.

Another sign of status is a lavish lobby, perhaps a sunlit atrium with marble floors and a bubbling fountain.

Once inside, visitors find a three-story atrium dominated by a sleek staircase.

The biology building has an atrium that contains labeled plants that one can walk through.

After logging in visitors will arrive in an atrium displaying a map of the exhibition with the names of participating galleries.

The atrium will soon be open to the public on weekends.

Of course, when everything was said and done she denied coming out to the atrium waiting area and telling the entirie family.

The restaurant is located in the stairwell and atrium of a historic building and is a visual treat.

The ground-floor atrium is transformed into a jazz supper club that draws top-shelf talent.

But inside, a whole world opens up: behind the front door of each house is an open-air atrium.

If the tricuspid valve does not open, the blood cannot flow from the right atrium to the right ventricle.

There is the sharp report of a slamming door and the staccato of high heels crossing the ceramic tiles of the atrium garden.

The building will have a cedar facade, nine peaks and a two-story atrium.

COLLAPSE

Collins

World English Dictionary

atrium (ˈeɪtrɪəm, ˈɑː-)

—n , pl atria
1.	the open main court of a Roman house
2.	a central often glass-roofed hall that extends through several storeys in a building, such as a shopping centre or hotel
3.	a court in front of an early Christian or medieval church, esp one flanked by colonnades
4.	anatomy a cavity or chamber in the body, esp the upper chamber of each half of the heart

[C17: from Latin; related to āter black, perhaps originally referring to the part of the house that was blackened by smoke from the hearth]

'atrial

—*adj*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

atrium

1570s, from L., "central court or main room of an ancient Roman house," sometimes said (on authority of Varro, "De Lingua Latina") to be an Etruscan word, but perhaps from PIE *ater- "fire," on notion of "place where smoke from the hearth escapes" (through a hole in the roof). Anatomical sense of "either

EXPAND

of the upper cavities of the heart" first recorded 1870. Meaning "skylit central court in a public building" first attested 1967. Related: Atrial (1869).

COLLAPSE

American Heritage

Medical Dictionary

atrium a·tri·um (ā'trē-əm)
n. pl. a·tri·ums or a·tri·a (ā'trē-ə)

A chamber or cavity to which several chambers or passageways are connected.
Either the right or the left upper chamber of the heart that receives blood from the veins and forces it into a ventricle.
That part of the tympanic cavity that lies below the eardrum.
A subdivision of the alveolar duct in the lung from which the alveolar sacs open.

American Heritage

Science Dictionary

atrium (ā'trē-əm) Pronunciation Key
Plural atria or atriums
A chamber of the heart that receives blood from the veins and forces it by muscular contraction into a ventricle. Mammals, birds, reptiles, and amphibians have two atria; fish have one.

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