adiaphonon
noun
ad·i·aph·o·non
ˌa-dē-ˈa-fə-ˌnän
plural -s
: a keyboard instrument resembling the piano but having steel bars instead of strings
Word History
Etymology
New Latin, from a- entry 2 + Greek diaphōnon, neuter of diaphōnos discordant
First Known Use
1819, in the meaning defined above