bĭfŏris, e (bĭfŏrus, a, um, Vitr. 4, 6 fin.), adj. [bis-foris].
I Having two doors or folding-doors : valvae, Ov. M. 2, 4: fenestrae, id. P. 3, 3, 5.—
II Having two openings or holes , double : via (narium), Ap. Dogm. Plat. 1.—Poet.: ubi assuetis biforem dat tibia cantum, Verg. A. 9, 618 (bisonum, imparem, Serv.); Aus. Cent. Nupt. 27: biforis tumultus, Stat. Th. 4, 668.