Skull

The skull was the framework of the head in most animals including humanoids. The skull protects the brain and has sockets for housing the eyes. It is part of the skeletal system.

The skulls of the headless monks were kept in the Seventh Transept. They were carnivorous and ate anything that came in, from rats to intruders. (DW: The Wedding of River Song)

Faction Paradox wore the skulls of dead Time Lords from another universe. (EDA: Alien Bodies)