The Collaborative International Dictionary of English v.0.48:
Rhinoscope \Rhi"no*scope\, n. [Rhino- + -scope.] A small mirror for use in rhinoscopy. [1913 Webster]WordNet (r) 3.0 (2006):
rhinoscope n 1: medical instrument consisting of a mirror mounted at an angle on a rod; used to examine the nasal passages (through the nasopharynx)