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, especially of
voltages or currents; it usually consists 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.
[Webster 1913 Suppl.]