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