
1) An upper chamber of the heart 2) Architectural element 3) Architectural space 4) Bright entrance hall 5) Cardiac anatomy 6) Central court 7) Central courtyard 8) Central hall 9) Chamber 10) Chamber of the heart 11) Circulatory chamber 12) Court 13) Court of ancient Roman house 14) Court with a skylight
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https://www.crosswordclues.com/clue/atrium

1) Courtyard
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https://www.crosswordclues.com/clue/atrium

(plural: atria) inner court of a Roman or C20 house; in a multi-story building, a toplit covered court rising through all stories.
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http://en.wikipedia.org/wiki/Glossary_of_architecture

• (n.) A square hall lighted from above, into which rooms open at one or more levels. • (n.) The main part of either auricle of the heart as distinct from the auricular appendix. Also, the whole articular portion of the heart. • (n.) An open court with a porch or gallery around three or more sides; especially at the entrance of a bas...
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http://thinkexist.com/dictionary/meaning/atrium/

(L.; Gr. atrion hall) 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.
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http://users.ugent.be/~rvdstich/eugloss/DIC/dictio11.html

An interior court on to which rooms open. The atrium has become an almost universal feature of commercial buildings. Occasionally, the incorporation of an atrium can transform existing buildings. Although much of the appeal of atria lies in their aesthetic attributes, they have the practical advan...
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http://www.daviddarling.info/encyclopedia/A/AE_atrium.html

An interior court to which rooms open.
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http://www.electromn.com/glossary/a.htm

A structure that provides lots of above light for plants. Commercial buildings often have their foyer as an atrium. Many homes have built in atriums.
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http://www.encyclo.co.uk/local/20077

A large, glazed area in an office building designed to let light into the lower floors (small ones formerly known as light wells!).Â
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http://www.encyclo.co.uk/local/20698

<anatomy> 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) ...
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http://www.encyclo.co.uk/local/20973

(a´tre-әm) pl. a´tria a chamber affording entrance, especially one of the upper chambers on either side of the heart, which receive blood from the body and transmit it to the ventricles. Atria of the heart. left atrium the upper chamber of...
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http://www.encyclo.co.uk/local/21001

(= atria (plural)) A cavity in the body, especially either of the two upper chambers of the heart in higher vertebrates.
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http://www.encyclo.co.uk/visitor-contributions.php
A'tri·um noun ;
plural Atria [ Latin , the fore court of a Roman house.]
1. (Architecture) (a) A square hall lighted from above, into which rooms open at one or more levels.
(b) An open court with a porch or gallery around three or more sides; especi...
Found on
http://www.encyclo.co.uk/webster/A/140
A'tri·um noun (Anat.) 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.
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http://www.encyclo.co.uk/webster/A/141

A cavity into which one or more other cavities open.
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http://www.gadsbywicks.co.uk/uploaded/3822.pdf

(a;tre-um) Either of the two superior chambers of the heart that receive venous blood.
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http://www.mhhe.com/biosci/abio/glossary.mhtml

An atrium is a square hall lighted from above, into which rooms open at one or more levels. Originally, the entrance hall to a Roman house, the concept was adopted as an open court with a porch or gallery around three or more sides at the entrance of a basilica or other church. The name was extended in the Middle Ages to the open churchyard or ceme...
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http://www.probertencyclopaedia.com/browse/TA.HTM

An open court within a building.
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https://operations.fs.cornell.edu/info/ir_glossary.cfm

(Latin) in a Roman domus (house), the atrium was the central hall that followed the fauces, the jaws or entryway of the house, and opened into the tablinum, the reception area where guests were greeted.
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https://www.encyclo.co.uk/local/10135
noun any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)
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https://www.encyclo.co.uk/local/20974
(architecture) In architecture, an open inner courtyard. An atrium was originally the central court or main room of an ancient Roman house, open to the sky, often with a shallow pool to catch rainwater
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https://www.encyclo.co.uk/local/21221

An interior court to which rooms open.
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https://www.encyclo.co.uk/local/22819

· Also calledcavaedium.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. See diag. underbasilica. · a skylit central court in a contemporary...
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https://www.infoplease.com/dictionary/atrium
(atria pl.) one of two upper chambers in the heart.
Found on
https://www.stanfordchildrens.org/en/topic/default?id=glossary---cardiovasc
(right and left) The two upper or holding chambers of the heart (together referred to as atria).
Found on
https://www.texasheart.org/heart-health/heart-information-center/topics/a-z
No exact match found.