The term "vena mesenterica superior" refers to a major vein located in the abdomen that plays a crucial role in the circulatory system. While there are no direct synonyms for this specific anatomical term, it is important to note that there are related terms that describe similar structures. One such alternative term is "superior mesenteric vein", which refers to the same vein but in a different order of the wording. Additionally, the broader category of veins in the abdominal region includes various vessels such as the hepatic veins, renal veins, and iliac veins, among others. These terms collectively represent the intricate network of veins that facilitate blood flow within the human body.