a. Containing, consisting of, having, or involving two parts; composed in two parts, as a piece of music, or for two actors, as a play.
1854. Cherubini’s Counterpoint, 20. It is prohibited in three-part-counterpoint, as in two-part-counterpoint, to make concealed fifths.
1894. S. Fiske, Holiday Stories (1900), 207. Two-part comediettas.
So Two-parted a., divided into two parts, bipartite.
1793. Martyn, Lang. Bot., Two-parted leaf, perianth,… divided in two down to the base.
1830. Lindley, Nat. Syst. Bot., 57. Calyx … tubular, with a two-parted limb.
