Regeneration

Regeneration is the body's ability to automatically repair injuries at a rate of speed that surpasses that of a normal human. As this is a power and not a skill, medical knowledge is not required for this to take effect. Super-speedsters develop this power as a function of super-speed and their connection to the Speed Force. In some cases, an individual may even possess the ability to regenerate missing limbs. This power is exclusive to an individual's own body and cannot be used on others (see also, Healing).

Examples
The following characters possess regeneration to some degree.
 * Flash (Wally West)
 * Killer Croc
 * Lobo
 * Martian Manhunter
 * Northwind
 * Swamp Thing (Alec Holland)