The term "caval valve" refers to the inferior vena cava valve, a structure located within the largest vein in the human body. Synonyms for this anatomical feature include the "caval venous valve", "inferior vena cava venous valve", or simply "IVC valve". This valve is crucial in preventing the backflow of deoxygenated blood, ensuring proper circulation. While the "caval valve" is the commonly used term, it is essential to understand these synonyms when discussing the anatomy and physiology of the cardiovascular system. Proper knowledge of these synonyms facilitates effective communication in the medical field and aids in understanding this vital component of the circulatory system.