1. [syn: whispering gallery, whispering dome]
The Collaborative International Dictionary of English v.0.48:
a. & n. from Whisper. v. t.
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]
WordNet (r) 3.0 (2006):
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]