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WordNet 3.0Copyright Princeton University
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Short "hint"

The chamber or one of the two chambers of the heart by which the blood is received from the veins and forced into the ventricle or ventricles and which in man consists of a main cavity and an auricular appendage.

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Usage examples (22)
  • L.H. ANSWER: The atria are the two upper heart chambers.
  • What happens here, Betty, is the top two chambers called the atria just stopped beating normally.
  • This involves the two small upper chambers of the heart, the atria.
  • His atria were left intact and sewn down to the top of the AbioCor.
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The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.