The term 'back of the head' is often referred to as the OCCIPUT, which is a seven-letter word. The OCCIPUT is the anatomical term for the back of the skull, which is the bony structure that encloses and protects the brain. It is located at the base of the skull and is the most posterior part of the cranium. The OCCIPUT is made up of several bones, including the occipital bone, which is the largest bone in the skull.