- Like a rat's tail in form; as, a rat-tail file, which is
round, slender, and tapering. See Illust. of File.
2 . Rat-tail
[ n.]
- An excrescence growing from the pastern to the middle of
the shank of a horse. - The California chimaera. See Chimaera. - Any fish of the genus Macrurus. See Grenadier, 2.