Vena Circumflexa Ilium is a medical term that refers to a major vein that drains the hip and pelvic region. However, there are several other terms that can be used to describe this vein. Some of the synonyms for the Vena Circumflexa Ilium include the iliac circumflex vein, circumflex iliac vein, and iliac vein. Additionally, in some medical literature, it may also be referred to as the external iliac vein or the femoral vein. It is important to be familiar with these synonyms as they may be used interchangeably to describe this vein in medical contexts.