Auricula Atrii is a medical term that refers to the atrial appendage of the heart. There are some synonyms that are commonly used to describe this part of the heart, such as auricle, atrial pouch, and left atrial appendage. Another synonym that can be used is the ear-shaped atrial appendage, which derives from the Latin word "auricula," meaning small ear. This part of the heart plays an important role in regulating blood flow and preventing blood clots from forming. It is crucial to understand the different terms related to the heart and its functions for proper medical diagnosis and treatment.