Zombie

An organism in which at one point all biological processes had ceased, and afterwards had them reactivated (most commonly by the T-virus). These creatures hunger for the flesh of the living but do not generally need it to survive. When a living organism is found, other than a plant species, multiple zombies will gather, increasing their chances for a meal. Zombies are completely inert to each other, in any situation. Zombies are also not limited to human type and can infect other types of animals, and quite rarely, plants. Zombies generally have a longer life-span than their non-zombie counterparts as it is the nature of that which brought them back to life to keep them alive.