{ ||Ma*chæ"ro*dus (m&adot;*kē"r&osl;*dŭs), ||Ma*chai"ro*dus (m&adot;*kī"r&osl;*dŭs), } n. [NL., fr. Gr. ma`chaira dagger + 'odoy`s tooth.] (Paleon.) A genus of extinct mammals allied to the cats, and having in the upper jaw canine teeth of remarkable size and strength; -- hence called saber-toothed tigers.