pendulographn.
/ˈpɛndjᵿləɡrɑːf/, /ˈpɛndʒᵿləɡrɑːf/, /ˈpɛndjᵿləɡraf/, /ˈpɛndʒᵿləɡraf/, U.S. /ˈpɛndʒələˌɡræf/ rare.
A curve representing a combination of musical sounds, traced by an instrument, such as a harmonograph, which combines the vibrations of two or more pendulums.
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society > leisure > the arts > music > study or science of music > [noun] > of acoustical aspects > curve traced by harmonograph
pendulograph1881
1881 J. Andrew Pendulograph 18 These Pendulographs are pictures or portraits of the intervals, concords, and discords of the Musical System.
1916 Science New Ser. 24 Mar. 403/2 This path is that which would be traced by a pendulograph as made by an advancing pendulum.
This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).
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n.1881