coulisse

n. groove for thing to slide in; backstage place

Noun
1. a flat situated in the wings
(synonym) wing flat
(hypernym) flat
2. a timber member grooved to take a sliding panel
(hypernym) timber

n. coulisse, sideline; sliding door

v. slide, move smoothly across a surface

n. offstage, behind the curtains

(n.)
One of the side scenes of the stage in a theater, or the space included between the side scenes.
  

(n.)
A piece of timber having a groove in which something glides.