Illustrated Companion to the Latin Dictionary/Biforis

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

BIF'ORIS and BIF'ORUS (δίθυρος). Bivalve; applied to windows and doors, to indicate those which open in two leaves, instead of all in one piece, similar to what we call French windows and folding-doors. (Ovid. Pont. iii. 3. 5. Vitruv. iv. 6. 6.) See the illustration to ANTEPAGMENTUM.