For questions about Regeneration, the action or process of regenerating or being regenerated, in particular the formation of new animal or plant tissue. Always use in conjunction with the specific work tag being asked about.
Many fictional characters have the ability to regenerate. This ability has been featured in comic books, novels, television, film, and other mediums.
The more notable characters with regeneration are Doctor Who, Wolverine, The Incredible Hulk et al.
See the Wikipedia page on "Healing factor" for a much bigger list.