Source : Webster's Revised Unabridged Dictionary (1913)

Nabk \Nabk\ (n[a^]bk), n. [Ar. nabiqa, nibqa.] (Bot.)
   The edible berries of the {Zizyphys Lotus}, a tree of
   Northern Africa, and Southwestern Europe. [Written also
   {nubk}.] See {Lotus}
   (b), and {Sadr}.