Router
Router , noun
1.
(a) (Carpentry) A plane made like a spokeshave, for working the inside edges of circular sashes.
(b)
(Carpentry) A plane with a hooked tool protruding far below the sole, for smoothing the bottom of a cavity.
2.
(Machinery) A machine with a rapidly revolving vertical spindle and cutter for scooping out the surface of wood or metal, as between and around the engraved parts of an electrotype.