n. The tail of a fox. It was anciently one of the badges of a fool. [Properly fox-tail.]n. 2. One of various species of grass with soft brush-like spikes of flowers, especially of the genus Alopecurus, and also of the genera Setaria and (in Jamaica) Andropogon. The meadow-foxtail, is Alopecurus pratensis; the slender foxtailn. A club-moss, Lycopodium clavatum. [Prov. Eng.]n. In metal., the cinder, of a more or less cylindrical from and hollow in the center, obtained in the last stage of the charcoal-finery process.