Source : Webster's Revised Unabridged Dictionary (1913)

Rhinoscope \Rhi"no*scope\, n. [Rhino- + -scope.]
   A small mirror for use in rhinoscopy.

Source : WordNet®

rhinoscope
     n : medical instrument consisting of a mirror mounted at an
         angle on a rod; used to examine the nasal passages
         (through the nasopharynx)