medial
/ˈmē-dē-əl/
adjective
mean, average
being or occurring in the middle
extending toward the middle; especially : lying or extending toward the median axis of the body
noun
a ligament of the inner knee that connects medial parts of the femur and tibia and helps to stabilize the knee joint —called also MCL
ulnar collateral ligament —called also MCL
… Barry Sanders, sprained the medial collateral ligament in his left knee on Thanksgiving, but the reports of his demise have been greatly exaggerated.