The term 'Bone End of Spine' refers to two bones located at the lower end of the spine. The first bone is the COCCYX, which is a triangular bone located at the base of the spine and is composed of four fused vertebrae. The second bone is the sacrum, which is a large, triangular bone located between the two hip bones and is composed of five fused vertebrae. Together, the COCCYX and sacrum form the lower end of the spine.