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atrium

 
Noun atrium has 2 senses
  1. atrium - any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)
    --1 is a kind of
    chamber
    --1 has particulars: atrium cordis, atrium of the heart
  2. atrium - the central area in a building; open to the sky
    --2 is a kind of
    court, courtyard
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