From The Collaborative International Dictionary of English v.0.48 [gcide]:
Moringa \Mo*rin"ga\, prop. n. [Malayam murunggi.] (Bot.)
A genus of trees of Southern India and Northern Africa. One
species (Moringa pterygosperma) is the horse-radish tree,
and its seeds, as well as those of Moringa aptera, are
known in commerce as ben or ben nuts, and yield the oil
called oil of ben.
[1913 Webster]