\Plan`chette"\, n. [F. See {Planchet}.]
1. A circumferentor. See {Circumferentor}.
2. A small tablet of wood supported on casters and having a
   pencil attached. The characters produced by the pencil on
   paper, while the hand rests on the instrument and it is
   allowed to move, are sometimes translated as of oracular
   or supernatural import.