Machaerodus
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Ma`chae´ro`dus
(må`kē´rô`dŭs)| n. | 1. | (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. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.