auricular appendix

Noun
  1. A pouch projecting from the top front of each atrium of the heart (synset 105399905)
    is a type of: pocket, pouch - (anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican)
    is a part of: atrium cordis, atrium of the heart - the upper chamber of each half of the heart
    same as: auricula, auricular appendage

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