Operetta (It.)
An opera with spoken dialogue.
Ophicleide, Oficleide (It.) [from Gr., ophis, snake, and kleis, key. Lit., "keyed snake," in allusion to its contorted shape].
A large brass instrument of the bugle family, i. e., with keys, now little used. The Onslow, G. Composer; France. B. 1784; d. 1852...
Osborne, G. A. Composer, pianist; Ireland.
B. 1806; d. 1893.
OPPURE best example of its use by a great composer will be found in Mendelssohn's "Midsummer Night's Dream" music.