ORCHEL
Or"chel, n.

Defn: Archil.

ORCHESOGRAPHY
Or`che*sog"ra*phy, n. Etym: [Gr. -graphy.]

Defn: A treatise upon dancing. [R.]

ORCHESTER
Or"ches*ter, n.

Defn: See Orchestra.

ORCHESTIAN
Or*ches"tian, n. Etym: [From Gr. Orchestra.] (Zoöl.)

Defn: Any species of amphipod crustacean of the genus Orchestia, or family Orchestidæ. See Beach flea, under Beach.

ORCHESTRA
Or"ches*tra, n. Etym: [L. orchestra, Gr. orchestre.]

1. The space in a theater between the stage and the audience; — originally appropriated by the Greeks to the chorus and its evolutions, afterward by the Romans to persons of distinction, and by the moderns to a band of instrumental musicians.