Dictionary

triforium

noun tri·fo·ri·um \trī-ˈfr-ē-əm\
plural -ria \-ē-ə\

Definition of TRIFORIUM

:  a gallery forming an upper story to the aisle of a church and typically an arcaded story between the nave arches and clerestory

Origin of TRIFORIUM

Medieval Latin
First Known Use: 1703

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