The Collaborative International Dictionary of English v.0.48:

Dika \Di"ka\, n. [Native West African name.]
   A kind of food, made from the almondlike seeds of the
   Irvingia Barteri, much used by natives of the west coast of
   Africa; -- called also dika bread.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dika bread
    n 1: somewhat astringent paste prepared by grinding and heating
         seeds of the African wild mango; a staple food of some
         African peoples