section one of several parts or pieces that fit with others to constitute a whole object; "a section of a fishing rod"; "metal sections were used below ground"; "finished the final segment of the road"
orchestra -
The area in a theatre or concert hall where the musicians sit, immediately in front of and below the stage, sometimes also used by other performers.
Wikipedia
An orchestra is a sizable instrumental ensemble that contains sections of string, brass, woodwind, and percussion instruments. The term orchestra derives from the Greek ορχήστρα, the name for the area in front of an ancient Greek stage reserved for the Greek chorus. The orchestra grew by accretion throughout the eighteenth and nineteenth centuries, but changed very little in composition during the course of the twentieth century.
OmegaWiki Dictionary
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orchestra A large group of musicians who play together on various instruments.
