The Collaborative International Dictionary of English v.0.48:

Jerusalem \Je*ru"sa*lem\ (j[-e]*r[udd]"s[.a]*l[e^]m), n. [Gr.
   'Ieroysalh`m, fr. Heb. Y[e^]r[=u]sh[=a]laim.]
   The chief city of Palestine, intimately associated with the
   glory of the Jewish nation, and the life and death of Jesus
   Christ.
   [1913 Webster]

   Jerusalem artichoke [Perh. a corrupt. of It. girasole i.e.,
      sunflower, or turnsole. See Gyre, Solar.] (Bot.)
   (a) An American plant, a perennial species of sunflower
       (Helianthus tuberosus), whose tubers are sometimes used
       as food.
   (b) One of the tubers themselves.

   Jerusalem cherry (Bot.), the popular name of either of two
      species of Solanum (Solanum Pseudo-capsicum and
      Solanum capsicastrum), cultivated as ornamental house
      plants. They bear bright red berries of about the size of
      cherries.

   Jerusalem oak (Bot.), an aromatic goosefoot (Chenopodium
      Botrys), common about houses and along roadsides.

   Jerusalem sage (Bot.), a perennial herb of the Mint family
      (Phlomis tuberosa).

   Jerusalem thorn (Bot.), a spiny, leguminous tree
      (Parkinsonia aculeata), widely dispersed in warm
      countries, and used for hedges.

   The New Jerusalem, Heaven; the Celestial City.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

madeira winter cherry \madeira winter cherry\ n. (Bot.)
   A small South American shrub (Solanum pseudocapsicum)
   cultivated as a houseplant for its abundant ornamental but
   poisonous red or yellow cherrylike fruit.

   Syn: Jerusalem cherry, winter cherry, Madeira winter cherry,
        Solanum pseudocapsicum.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Solanum pseudocapsicum
    n 1: small South American shrub cultivated as a houseplant for
         its abundant ornamental but poisonous red or yellow cherry-
         sized fruit [syn: Jerusalem cherry, winter cherry,
         Madeira winter cherry, Solanum pseudocapsicum]