The Collaborative International Dictionary of English v.0.48:
Otoscope \O"to*scope\, n. [Oto- + -scope.] An instrument for examining the condition of the ear. [1913 Webster]WordNet (r) 3.0 (2006):
otoscope n 1: medical instrument consisting of a magnifying lens and light; used for examining the external ear (the auditory meatus and especially the tympanic membrane) [syn: otoscope, auriscope, auroscope]