Source : Webster's Revised Unabridged Dictionary (1913)

Biramous \Bi*ra"mous\, a. [Pref. bi- + ramous.] (Biol.)
   Having, or consisting of, two branches.

Source : WordNet®

biramous
     adj : resembling a fork; divided or separated into two branches;
           "the biramous appendages of an arthropod"; "long
           branched hairs on its legson which pollen collects"; "a
           forked river"; "a forked tail"; "forked lightning";
           "horseradish grown in poor soil may develop prongy
           roots" [syn: {bifurcate}, {branched}, {forked}, {forficate},
            {pronged}, {prongy}]