Source : Webster's Revised Unabridged Dictionary (1913)

Rhinoscopy \Rhi*nos"co*py\, n. [Rhino- + -scopy.] (Physiol.)
   The examination or study of the soft palate, posterior nares,
   etc., by means of a laryngoscopic mirror introduced into the
   pharynx.

Source : WordNet®

rhinoscopy
     n : examination of the nasal passages (either through the
         anterior nares or with a rhinoscope through the
         nasopharynx)