The Collaborative International Dictionary of English v.0.48:

Sesame \Ses"a*me\, n. [L. sesamum, sesama, Gr. ????, ???: cf. F.
   s['e]same.] (Bot.)
   Either of two annual herbaceous plants of the genus Sesamum
   (Sesamum Indicum, and Sesamum orientale), from the seeds
   of which an oil is expressed; also, the small obovate,
   flattish seeds of these plants, sometimes used as food. See
   Benne.
   [1913 Webster]

   Open Sesame, the magical command which opened the door of
      the robber's den in the Arabian Nights' tale of "The Forty
      Thieves;" hence, a magical password.

   Sesame grass. (Bot.) Same as Gama grass.
      [1913 Webster]

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):

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