piano-violin
/pɪˌanəʊvʌɪəˈlɪn/rare (historical in later use)
noun
Any of various instruments combining elements of a piano and a violin; especially a keyboard instrument on which a tone resembling that of a violin is produced by the friction of a revolving cylinder against strings.
Origin
Mid 19th century; earliest use found in Henry Howe (1816–1893). From piano + violin.