The term 'knee bone' can be broken down into two crossword solutions: PATELLA (7 letters) and STIFLE (6 letters). The PATELLA, also known as the kneecap, is a small, triangular-shaped bone located at the front of the knee joint. It is connected to the femur, tibia, and fibula by ligaments and muscles, and helps to protect the knee joint from injury. The STIFLE is the joint between the femur and tibia, and is the equivalent of the human knee joint. It is made up of several bones, ligaments, and tendons, and helps to provide stability and flexibility to the knee.