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 (sĕm′ē-dōm′, sĕm′ī-)
A roof covering a semicircular space; half a dome.

sem′i·domed′ (-dōmd′) adj.


(Architecture) a half-dome, esp one used to cover a semicircular apse
References in periodicals archive ?
The Relying place of semidome that is similar to two-shell Seljuk dome is firmly attached to the Bedchambers.
With light coming down from the centre, this dramatic semidome is reminiscent of the oval roof of Leeds Corn Exchange by Cuthbert Brodrick (1821-1905) another spectacular Victorian structure--except that, in the centre, the ribs rise from the floor to spread out like a tree.
The semicylindrical wall and the semidome of the apse of the holy bema were restored.