Panthera's a genus of the family Felidae (the cats), which contains four well-known living species: the Tiger, the Lion, the Jaguar, and the Leopard. The genus comprises about half of the Pantherinae subfamily, the big cats. One meaning of the word panther's to designate cats of this subfamily. The word derives from Greek pan- ("all") and thēr ("beast of prey") because they can hunt and kill almost everything. The Greek word πάνθηρ, pánthēr, referre… (More on Panthera)