B / bĭ-frons
adjective

bĭ-frons

gen. bĭ-frontis
with two foreheads; with two faces
with two foreheads, or, in a more extended sense, with two faces, an epithet of Janus, Verg. A. 7, 180; 12, 198; Gav. Bass. ap. Macr. S. 1, 9, 13.