proscenium arch

English Thesaurus

1. the arch over the opening in the proscenium wall (noun.artifact)

hypernym	:	arch,
definition	:	(architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it (noun.artifact)

part meronym	:	proscenium, proscenium wall,
definition	:	the wall that separates the stage from the auditorium in a modern theater (noun.artifact)