n. (祭坛后的)装饰屏风

[ noun ]
a painted or carved screen placed above and behind an altar or communion table
<noun.artifact>

Reredos \Rere"dos\ (r?r"d?s), n. [From rear + F. dos back, L.
dorsum. Cf. {Dorsal}.] (Arch.)
(a) A screen or partition wall behind an altar.
(b) The back of a fireplace.
(c) The open hearth, upon which fires were lighted,
immediately under the louver, in the center of ancient
halls. [Also spelt {reredosse}.] --Fairholt.