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}.

Enchanter \En*chant"er\, n. [Cf. F. enchanteur.]
   One who enchants; a sorcerer or magician; also, one who
   delights as by an enchantment.

         Like ghosts from an enchanter fleeing.   --Shelley.

   {Enchanter's nightshade} (Bot.), a genus ({Circ[ae]a}) of low
      inconspicuous, perennial plants, found in damp, shady
      places.

Source : WordNet®

enchanter's nightshade
     n : any of several erect perennial rhizomatous herbs of the
         genus Circaea having white flowers that open at dawn;
         northern hemisphere