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atrium

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atrium/ˈeɪtrijəm/noun
pluralatria/ˈeɪtrijə/alsoatriums
atrium
/ˈeɪtrijəm/
noun
pluralatria/ˈeɪtrijə/alsoatriums
Learner's definition of ATRIUM  
[count]
: an open area inside a tall building that has windows to let light in from above
technical  : one of two sections of the heart that take in blood from the veins
— compare ventricle
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