AURICLE

n. chamber of the heart; outer ear (of animals)

Auricle has the following meanings: A small conical pouch that projects from each atrium of the heart.Right auricleLeft auricleAn older name for the left and right atria of the heart.The external portion of the ear, the pinna.In some grasses it is the name given to ear-like outgrowths at the junction of the leaf blade and the leaf sheath.It can be found in a fetal pig.
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Auricle /au·ri·cle/ 1. pinna; the flap of the ear. 2. the ear-shaped appendage of either atrium of the heart. 3. formerly, the atrium of the heart. [more]Auricle - Community and Resources

Noun
1. a small conical pouch projecting from the upper anterior part of each atrium of the heart
(synonym) atrial auricle, auricula atrii
(hypernym) pouch, pocket
(part-holonym) atrium cordis, atrium of the heart
2. the externally visible cartilaginous structure of the external ear
(synonym) pinna, ear
(hypernym) cartilaginous structure
(hyponym) cauliflower ear
(part-holonym) external ear, outer ear
(part-meronym) earlobe, ear lobe

(n.)
The external ear, or that part of the ear which is prominent from the head.
  

(n.)
The chamber, or one of the two chambers, of the heart, by which the blood is received and transmitted to the ventricle or ventricles; -- so called from its resemblance to the auricle or external ear of some quadrupeds. See Heart.
  

(n.)
An instrument applied to the ears to give aid in hearing; a kind of ear trumpet.
  

(n.)
An angular or ear-shaped lobe.