n. sing. & pl. someone who is no longer alive;
adj.
a.
a. Divided into, or consisting of, three parts; tripartite. [ 1913 Webster ]
Three-parted leaf (Bot.),
a. [ Pref. tri- + parted. ] [ 1913 Webster ]
a. (Bot.) Divided from the border to the base into two distinct parts; bipartite. [ 1913 Webster ]