Dictionary
atrium
Meaning
- A central room or space in ancient Roman homes, open to the sky in the middle; a similar space in other buildings.
- A square hall lit by daylight from above, into which rooms open at one or more levels.
- A cavity, entrance, or passage.
- Any enclosed body cavity or chamber.
- An upper chamber of the heart that receives blood from the veins and forces it into a ventricle. In higher vertebrates, the right atrium receives blood from the superior vena cava and inferior vena cava, and the left atrium receives blood from the left and right pulmonary veins.
- A microscopic air sac within a pulmonary alveolus.
- A cavity inside a porate aperture of a pollen grain formed by the separation of the sexine and nexine layers, widening toward the interior of the grain.
Hyphenated as
a‧tri‧um
Pronounced as (IPA)
/ˈeɪ.tɹi.əm/
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