Source : Webster's Revised Unabridged Dictionary (1913)

Nightshade \Night"shade`\, n. [AS. nichtscadu.] (Bot.)
   A common name of many species of the genus {Solanum}, given
   esp. to the {Solanum nigrum}, or black nightshade, a low,
   branching weed with small white flowers and black berries
   reputed to be poisonous.

   {Deadly nightshade}. Same as {Belladonna}
   (a) .

   {Enchanter's nightshade}. See under {Enchanter}.

   {Stinking nightshade}. See {Henbane}.

   {Three-leaved nightshade}. See {Trillium}.

Solanine \Sol"a*nine\, n. [L. solanum nightshade.] (Chem.)
   A poisonous alkaloid glucoside extracted from the berries of
   common nightshade ({Solanum nigrum}), and of bittersweet, and
   from potato sprouts, as a white crystalline substance having
   an acrid, burning taste; -- called also {solonia}, and
   {solanina}.

Source : WordNet®

Solanum nigrum
     n : Eurasian herb naturalized in America having white flowers
         and poisonous hairy foliage and bearing black berries
         that are sometimes poisonous but sometimes edible [syn: {black
         nightshade}, {common nightshade}, {poisonberry}, {poison-berry}]