saber-toothed tiger

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Any of numerous species of prehistoric cat-like mammals (genus Smilodon), characterized by massive, but short, legs and two large canine teeth, each about seven inches long and shaped like sabers.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any of many extinct cats of the Old and New Worlds having long swordlike upper canine teeth; from the Oligocene through the Pleistocene