noun (n)

• a small conical pouch projecting from the upper anterior part of each atrium of the heart(noun.body)

  Synonym:
  atrial auricle, auricula atrii
  

  source: wordnet30
• the externally visible cartilaginous structure of the external ear(noun.body)

  Synonym:
  ear, pinna
  

  source: wordnet30
• The external ear, or that part of the ear which is prominent from the head.(noun)

  source: webster1913