P / postscaenĭum
noun hapax

postscaenĭum

gen. postscaenii · gender neuter · decl. 2nd
or (), , post-scena
the part of the theatre behind the scenes; the postscenium;; secret
the part of the theatre behind the scenes, the postscenium; trop., for secret, mystery: postscenia vitae, those parts of life which are behind the scenes, Lucr. 4, 1186; v. Lachm. ad h. l.