(a.) Double; twofold; having two parts; as a duplex for an apartment or house\.

Janus-like ambidextrous apartment house bifacial bifold biform bifurcated bilateral binary binate biparous bipartisan bipartite bivalent condominium conduplicate cooperative apartment house dichotomous disomatous double double-barreled double-faced duadic dual dualistic duple duplex house duplicate duplicated dyadic flats geminate geminated high-rise apartment building identical matched second secondary tenement twain twin twinned two two-faced two-level two-ply two-sided two-story twofold