anterior cruciate ligament noun
: a cruciate ligament of each knee that is attached in front to the more medial aspect of the tibia, that passes upward, backward, and laterally through the middle of the knee crossing the posterior cruciate ligament to attach to the femur, that functions to prevent hyperextension of the knee and to keep the tibia from sliding forward in relation to the femur, and that is subject to sports injury especially by tearing—called also ACL
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