The contents of the cranium; the brain.

enkephalos = brain, from en = in + kephalos = head.

that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord

Greek en = within, and kephalos = head, hence, the brain.

The part of the central nervous system contained in the skull consisting of the brain, cerebellum and brain stem.

(the brain)—The term is applied to the hemispheres particularly.