smi·lo·don 
(smīlə-dŏn′)
(smīlə-dŏn′)n.
Any of various extinct saber-toothed cats of the genus Smilodon, having very long upper canines and widespread in Europe and the Americas during the late Pleistocene Epoch. Also called saber-toothed tiger.
[New Latin Smīlodōn, genus name : Greek smīlē, carving knife + -ODON.]