reie­‑nelipealihase kõõlusesse sulundatud lapik seesamluu, mis liigub reieluu alaosa eespinnal põlve painutades ja sirutades, a large, triangular-shaped sesamoid bone located in the back of the tendon of the quadriceps femoris muscle, and articulating in the knee joint with the distal extremity of the femur, a thick flat triangular movable bone that forms the anterior point of the knee and protects the front of the joint