The Collaborative International Dictionary of English v.0.48:

Probe \Probe\, n. (Surg.)
   An instrument for examining the depth or other circumstances
   of a wound, ulcer, or cavity, or the direction of a sinus, of
   for exploring for bullets, for stones in the bladder, etc.
   --Parr.
   [1913 Webster]

   Probe scissors, or Probe-pointed scissors (Surg.),
      scissors used to open wounds, the blade of which, to be
      thrust into the orifice, has a button at the end.
      --Wiseman.
      [1913 Webster]