The superior vena cava is a major vein that carries deoxygenated blood from the upper half of the body to the heart. It is sometimes referred to as the cranial vena cava or simply the upper vena cava. Other synonyms for superior vena cava include venae cavae superior, superior caval vein, and superior vena cava vein. In medical terminology, it may also be shortened to SVC. Understanding the various synonyms for this important vein can help individuals better communicate with medical professionals and comprehend medical terminology.