posterior cruciate ligament

:  a cruciate ligament of each knee that is attached medially in back between the condyles of the tibia, that passes upward and forward through the middle of the knee crossing the anterior cruciate ligament to attach to the medial aspect of the femur, that functions to prevent hyperflexion of the knee and to keep the tibia from sliding backward in relation to the femur when the knee is flexed, and that is stronger and less subject to sports injury by tearing than the anterior cruciate ligament—called also PCL