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|Look up Atrium or atrium in Wiktionary, the free dictionary.|
Atrium may refer to:
- Atrium (architecture), a large open space within a building, often featuring a glass roof
- Atrium (cinemas), movie theatre in Karachi, Pakistan
- Atrium (alveoli), microscopic air sacs in lungs
- Atrium (heart), an anatomical structure of the heart
- Atrium of the ventricular system of the brain
- Atrium (Cardiff), a University of South Wales building in Cardiff
- Atrium, the genital structure next to the genital aperture in the reproductive system of gastropods
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