medial meniscus of the knee

medial meniscus of the knee A thickened, crescent-shaped cartilage pad in the inner portion of the joint formed by the femur (the thigh bone) and the tibia (the shin bone). The medial meniscus is in the inner side, whereas the lateral meniscus is in the outer side of this knee joint. The meniscus acts as a smooth surface for the joint to move on, serves to evenly load the surface during weightbearing, and aids in disbursing joint fluid for joint lubrication. See also knee.