AnimalsViper, any member of the family Viperidae, a group of snakes found throughout Africa, Eurasia and the Americas.Viper, Agkistrodon piscivorus, a.k.a. the cottonmouth, a venomous snake found in North America.Viper, Heterodon platirhinos, a harmless colubrid found in North America.Viperfish, any member of the genus Chauliodus, a deepwater fish.ComicsViper , a supervillain in the Marvel UniverseViper Comics an ind