noun on·do·graph \ˈändəˌgraf, -rȧf\

Definition of ondograph

  1. :  an instrument for autographically recording the wave forms of varying electrical currents and especially rapidly varying alternating currents

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Origin and Etymology of ondograph

French ondographe, from onde wave (from Latin unda) + -o- + -graphe -graph — more at water

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a brief usually trivial fact

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