saucer dome: Meaning and Definition of

sau'cer dome"

Pronunciation: [key]
— Archit. Archit.
  1. a dome having the form of a segment of a sphere, with the center well below the springing line; a shallow dome, as in Roman or Byzantine architecture.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.