Appareil qui permet d'observer les variations d'une grandeur.
ETYM Latin oscillare to swing + -graph.
Instrument for recording alternating current wave forms.
Instrument recording electrical oscillations, e.g. a.c. current wave forms.
Instrument for displaying or recording the values of rapidly changing oscillations, electrical or mechanical.
A device for making a record of the wave forms of fluctuating voltages or currents.