whispering dome n 1: a space beneath a dome or arch in which sounds produced at certain points are clearly audible at certain distant points [syn: {whispering gallery}, {whispering dome}]
Whispering \Whis"per*ing\, a. & n. from {Whisper}. v. t. [1913 Webster] {Whispering gallery}, or {Whispering dome}, one of such a form that sounds produced in certain parts of it are concentrated by reflection from the walls to another part, so that whispers or feeble sounds are audible at a much greater distance than under ordinary circumstances. The dome of the U. S. capitol building is one example. [1913 Webster +PJC]