A <xref>genus</xref> of <xref>extinct</xref> <xref>mammals</xref> allied to the <xref>cats</xref>, and having in the upper <xref>jaw</xref> <xref>canine</xref> <xref>teeth</xref> of remarkable <xref>size</xref> and <xref>strength</xref>; hence called <xref>saber-toothed tigers</xref>.