Having two faces or fronts:
— The Roman Janus is bifacial.

synonym: biface.

Roget 90: double; doubled etc. v.; bicipital^†, bicephalous^†, bidental^†, bilabiate, bivalve, bivalvular^†, bifold^†, biform^†, bilateral; bifarious^†, bifacial^†; twofold, two-sided; disomatous^†; duplex; double-faced, double-headed; twin, duplicate, ingeminate^†; second.    ... show more