From The Collaborative International Dictionary of English v.0.48 :
Felidae \Felidae\ n. a natural family of lithe-bodied round-headed fissiped mammals, including the cats; wildcats; lions; leopards; cheetahs; and saber-toothed tigers. Syn: family Felidae. [WordNet 1.5]From WordNet (r) 3.0 (2006) :
Felidae n 1: cats; wildcats; lions; leopards; cheetahs; saber-toothed tigers [syn: Felidae, family Felidae]