Definition of melograph in US English:

melograph

(also mélographe)

noun

Music
historical
  • Any of several devices which automatically record the notes of the tune played on a pianoforte, harpsichord, or similar musical instrument.

noun

  • An electronic device which provides a continuous graphic record of melody, speech, etc., usually showing how pitch and loudness vary with time.

Origin

Late 19th century; earliest use found in George Grove (1820–1900), writer on music and lexicographer. Partly from French mélographe and partly from its probable etymon German Melograph from melo- + -graph<br>1960s; earliest use found in World of Music. From melo- + -graph.