Tri*fo"ri*um (?), n. [LL., fr. L. tri- (see Tri-) + foris, pl. fores, a door.] Arch.

The gallery or open space between the vaulting and the roof of the aisles of a church, often forming a rich arcade in the interior of the church, above the nave arches and below the clearstory windows.

 

© Webster 1913.

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