Panther n. : A large dark-colored variety of the leopard, by some zoologists considered a distinct species. It is marked with large ringlike spots, the centers of which are darker than the color of the body.

Panther n. : In America, the name is applied to the puma, or cougar, and sometimes to the jaguar.

Example:
I have a Panther gecko which I bought as a baby. How long does it take to get full grown?

Taxonomy
Panther, leopard, jaguar, free encyclopedia, cougar, American football team, codename, The Pink Panther, the British Army, BAE, protest movement, rugby league team, Large Cats, Panthera pardus, Black panther, Italian sports car, search, free dictionary.

Defination from the web:
panther, a subspecies of cougar (Puma concolor coryi or Puma concolor couguar) found in southern Florida ... Panther Caroso, a character in the Star Fox video game series. The Pink Panther, a series of British comedy films starring Peter Sellers ...