Source : Webster's Revised Unabridged Dictionary (1913)
{Fox wedge} (Mach. & Carpentry), a wedge for expanding the
split end of a bolt, cotter, dowel, tenon, or other piece,
to fasten the end in a hole or mortise and prevent
withdrawal. The wedge abuts on the bottom of the hole and
the piece is driven down upon it. Fastening by fox wedges
is called foxtail wedging.
{Fox wolf} (Zo["o]l.), one of several South American wild
dogs, belonging to the genus {Canis}. They have long,
bushy tails like a fox.