OSCILLOGRAPH

Os″cil‐lo‐graph (?), n. [[L. oscillare to swing + -graph.]] (Elec.) An apparatus for recording or indicating alternating-current wave forms or other electrical oscillations, usually consisting of a galvanometer with strong field, in which the mass of the moving part is very small and frequency of vibration very high. — Os′cil‐lo‐graph″ic (#), a.