- half a dome, especially as formed by a vertical section, as over a semicircular apse.
Origin of semidome
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for semidome
Against each side of the square a semidome is set, thus producing a quatrefoil plan at the vaulting level.Byzantine Churches in Constantinople
Alexander Van Millingen
- a half-dome, esp one used to cover a semicircular apse