Skeleton

A skeleton was the support structure for an animal. There were two kinds: an exoskeleton, which was external, or an endoskeleton, which was internal.

Some Gelth possessed several skeletons in the crypt of Cheltnam Abbey, then tried to open the Cardiff Rift permanently. They were stopped by the Tenth Doctor. (PROSE: Scared Stiff)

When Death entered the prime universe after someone was resurrected with the left-handed resurrection gauntlet, it had the physical form of a human skeleton shrouded in dark grey vapour. (TV: Dead Man Walking)

Gulfrargs were one of the few sentient species that evolved without a skeleton or an epidermis. (AUDIO: The Extinction Event)