Atrium

Atrium may refer to:

Anatomy

 * Atrium (heart), an anatomical structure of the heart
 * Atrium, the genital structure next to the genital aperture in the reproductive system of gastropods
 * Atrium of the ventricular system of the brain
 * Pulmonary alveolus (also known as atrium alveolus), microscopic air sac in the lungs

Architecture

 * Atrium (architecture), an open space within a building, either open to the sky or featuring a glass roof
 * Ancient Roman atrium, a grand entrance hall, reception room, and living room in a traditional Roman house.

Specific buildings

 * Amot Atrium Tower, a tower in Ramat Gan, Israel
 * Atrium, Cardiff, a University of South Wales building in Cardiff
 * Atrium Building, a skyscraper in Guatemala City
 * Atrium Casino, a casino in Dax, France
 * Atrium Cinemas, a movie theatre in Karachi, Pakistan
 * Winter Garden Atrium, a Brookfield Properties building in the World Financial Center of the World Trade Center, New York City
 * Atrium on Bay, a retail and office complex in Toronto, Canada

Companies

 * Atrium Health, based in Charlotte, North Carolina