Dome

Webster's Condensed Dictionary- A Condensed Dictionary of the English Language · 1909 · p. 176

dom, n. A building; house. (Arch.) A struc- ture above the roof, usually hemispherical in form; cupola; an erection resembling a cupola. [OF., fr. LL. and Gr. dom a, a house, Gr. domos, a building.]