The circumflex femoral vein, also known as the vena circumflexa femoris, is an important vessel that carries blood from the thigh to the heart. While this term is commonly used in medical circles, there are several synonyms that can be helpful when discussing this vein with patients or non-medical professionals. Some alternatives to circumflex femoral vein include the femoral circumflex vein, lateral femoral circumflex vein, and lateral venous circumflex system of the thigh. Regardless of the term used, it is important to understand the anatomy and function of this vein to properly diagnose and treat any related conditions.