ad·​i·​aph·​o·​non | \ ˌa-dē-ˈa-fə-ˌnän\
plural -s

Definition of adiaphonon

: a keyboard instrument resembling the piano but having steel bars instead of strings

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First Known Use of adiaphonon

1819, in the meaning defined above

History and Etymology for adiaphonon

New Latin, from a- entry 2 + Greek diaphōnon, neuter of diaphōnos discordant

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The first known use of adiaphonon was in 1819

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