Pianola n.

"percussion musical instrument in which tones are produced by blows of hammers upon stretched strings, the hammers being operated from a keyboard," 1803, from French piano (18c.), Italian piano, shortened forms of pianoforte (q.v.).

Essentially, the pianoforte is a large dulcimer with a keyboard ; but historically it replaced the clavichord and harpsichord, which were keyboard-instruments more akin to the harp than to the dulcimer. [Century Dictionary]

Piano wire "kind of strong steel wire used for strings of pianos," is attested from 1831. Piano-case "wooden box enclosing the mechanism of a piano" is by 1844.

"tenor violin," 1797, from Italian viola, from Old Provençal viola, from Medieval Latin vitula "stringed instrument," perhaps from Vitula, Roman goddess of joy (see fiddle), or from related Latin verb vitulari "to exult, be joyful." Viola da gamba "bass viol" (1724) is from Italian, literally "a viola for the leg" (i.e. to hold between the legs).