The obturator vein is a vein in the pelvis that drains blood from the thigh and pelvic area. Some synonyms for the obturator vein include the internal obturator vein, the obturator venous plexus, and the venae comitantes of the obturator artery. The obturator vein is a significant vein because it serves as a pathway for blood flow from the lower body to the heart. When blood flow is obstructed in the obturator vein, it can lead to serious medical conditions such as deep vein thrombosis. Understanding the synonyms for the obturator vein can aid in effective communication with medical professionals and enhance patient care.