or·ches·tri·on 
(ôr-kĕstrē-ən) also or·ches·tri·na (ôr′kĭ-strēnə)
(ôr-kĕstrē-ən) also or·ches·tri·na (ôr′kĭ-strēnə)n.
A large mechanical instrument resembling a barrel organ that produces sound in imitation of an orchestra.
[ORCHESTR(A) + (MELOD)EON.]