The Collaborative International Dictionary of English v.0.48:

benni \benni\ n.
   an East Indian annual erect herb (Sesamum indicum); the
   source of sesame seed or benniseed and sesame oil. Same
   as benne

   Syn: sesame, benne, benny.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Benne \Ben"ne\, n. [Malay bijen.] (Bot.)
   The name of two plants (Sesamum orientale and Sesamum
   indicum), originally Asiatic; -- also called oil plant.
   From their seeds an oil is expressed, called benne oil or
   sesame oil, used mostly for making soap. In the southern
   United States the seeds are used in candy. [Also spelled
   benni.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

benni
    n 1: East Indian annual erect herb; source of sesame seed or
         benniseed and sesame oil [syn: sesame, benne, benni,
         benny, Sesamum indicum]