Source : Webster's Revised Unabridged Dictionary (1913)

Jaguar \Ja*guar"\, n. [Braz. yago['a]ra: cf. & Pg. jaguar.]
   (Zo["o]l.)
   A large and powerful feline animal ({Felis onca}), ranging
   from Texas and Mexico to Patagonia. It is usually brownish
   yellow, with large, dark, somewhat angular rings, each
   generally inclosing one or two dark spots. It is chiefly
   arboreal in its habits. Called also the {American tiger}.

Source : WordNet®

Felis onca
     n : a large spotted feline of tropical America similar to the
         leopard; in some classifications considered a member of
         the genus Felis [syn: {jaguar}, {panther}, {Panthera onca}]