Bible Dictionaries
Semidome

Webster's Dictionary

(n.) A roof or ceiling covering a semicircular room or recess, or one of nearly that shape, as the apse of a church, a niche, or the like. It is approximately the quarter of a hollow sphere.

Bibliography Information
Webster, Noah. Entry for 'Semidome'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/semidome.html. 1828.