ONDOGRAPH
Source: 567
On″do‐graph (?), n. [[F. onde wave, L. unda + -graph.]] (Elec.) An instrument for autographically recording the wave forms of varying currents, esp. rapidly varying alternating currents.
Source: 567
On″do‐graph (?), n. [[F. onde wave, L. unda + -graph.]] (Elec.) An instrument for autographically recording the wave forms of varying currents, esp. rapidly varying alternating currents.