a device for recording the wave-forms of changing currents, voltages, or any other quantity that can be translated into electric energy, as sound waves.
Main Entry: os·cil·lo·graph Pronunciation: -"graf Function: noun : an instrument for recording alternating current waveforms or otherelectrical oscillations —os·cil·lo·graph·ic/ä-"sil-&-'graf-ik, "äs-&-l&-/adjective —os·cil·lo·graph·i·cal·ly/-i-k(&-)lE/adverb —os·cil·log·ra·phy/"äs-&-'läg-r&-fE/nounplural-phies