ONDOGRAPH

Noun

ondograph (plural ondographs)

An instrument for autographically recording the waveforms of varying currents, especially rapidly varying alternating currents.

Source: Wiktionary

On"do*graph, n. [F. onde wave, L. unda + -graph.] (Elec.)

Definition: An instrument for autographically recording the wave forms of varying currents, esp. rapidly varying alternating currents.

Source: Webster’s Unabridged Dictionary 1913 Edition

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