ondograph

ondograph

[on-duh-graf, -grahf]
noun
an instrument for graphically recording oscillatory variations, as in alternating currents.

Origin:
< French ondographe, equivalent to onde wave (< Latin unda) + -o- -o- + -graphe -graph

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ondograph (ˈɒndəʊˌɡrɑːf, -ˌɡræf)
 
n
an instrument for producing a graphical recording of an alternating current by measuring the charge imparted to a capacitor at different points in the cycle
 
[C20: from French, from onde wave + -graph]

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