Pronunciation: (sī"klu-ram'u, -rä'mu), [key]
1. a pictorial representation, in perspective, of a landscape, battle, etc., on the inner wall of a cylindrical room or hall, viewed by spectators occupying a position in the center.
2. Theat.a curved wall or drop at the back of a stage, used for creating an illusion of unlimited space or distance in the background of exterior scenes or for obtaining lighting effects.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.