The term 'Brain Covering' is composed of two crossword solutions: SKULL (5 letters) and Dura (4 letters). The SKULL is the bony structure that encases and protects the brain. It is made up of 22 bones that are fused together. The dura mater is a tough, fibrous membrane that covers the brain and spinal cord. It is the outermost layer of the meninges, which are three layers of protective tissue that surround the brain and spinal cord. Together, the SKULL and dura mater form the brain covering, providing protection for the delicate brain tissue.