Oscillograph
Pronunciation : Os"cil*lo*graph
Part of Speech : n.
Definition : Defn: 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.
[L. oscillare to swing + -graph.] (Elec.)
Source : Webster's Unabridged Dictionary, 1913