Definition of Mediastinum. Mediastinum: The area between the lungs. The organs in the mediastinum include the heart and its large veins and arteries, the trachea, the esophagus, the bronchi, and lymph nodes. Search MedTerms:
The Pax Romana ended because the Roman state had ceased to grow. Boundaries had been set for the Empire, and for the first time the army had become a drain on the econom â¦ y of Rome. Till this point the army provided new slaves and riches from conqured countries.
Pax Romana means 'Peace of Rome' or you can say 'Roman Peace'. It  refers to the approximately 207 years of peace and prosperity that  the Roman empire enjoyed after the est â¦ ablishment of the principate.  It was a period of relative peace and cultural achievement in the  Roman Empire.ax is the latin term for Peace PAX is also known as pack per person. The term ended up being designation for unit per person.. It now applies to everything such as hotel â¦ rooms, seats on flights and restaurants meals. 66 people found this useful.