The Collaborative International Dictionary of English v.0.48:

Egyptian \E*gyp"tian\, a. [L. Aegyptius, Gr. ?, fr. ? (L.
   Aegyptus) Egypt: cf. F. ['e]gyptien. Cf. Gypsy.]
   Pertaining to Egypt, in Africa.
   [1913 Webster]

   Egyptian bean. (Bot.)
   (a) The beanlike fruit of an aquatic plant (Nelumbium
       speciosum), somewhat resembling the water lily.
   (b) See under Bean, 1.

   Egyptian cross. See Illust. (No. 6) of Cross.

   Egyptian thorn (Bot.), a medium-sized tree (Acacia vera).
      It is one of the chief sources of the best gum arabic.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Egyptian bean
    n 1: perennial twining vine of Old World tropics having
         trifoliate leaves and racemes of fragrant purple pea-like
         flowers followed by maroon pods of edible seeds; grown as
         an ornamental and as a vegetable on the Indian
         subcontinent; sometimes placed in genus Dolichos [syn:
         hyacinth bean, bonavist, Indian bean, Egyptian
         bean, Lablab purpureus, Dolichos lablab]