The alligator is a crocodilian in the genus Alligator of the family Alligatoridae. The two living species are the American alligator and the Chinese alligator. In addition, several extinct species of alligator are known from fossil remains.
The name "alligator" is probably an anglicized form of el lagarto, the Spanish term for "the lizard", which early Spanish explorers and settlers in Florida called the alligator. Later English spellings of the name included allagarta and alagarto.
Mutated versions of the Alligator have been encountered in swamps within the Deathlands.