triforium

• POS: Noun
• HYPHEN: tri=fo=ri=um

CIDE DICTIONARY

triforium, n. [LL., fr. L. tri- (see Tri-) + foris, pl. fores, a door.].

 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.  [1913 Webster]

OXFORD DICTIONARY

triforium, n. (pl. triforia) a gallery or arcade above the arches of the nave, choir, and transepts of a church.

Etymology

AL, of unkn. orig.