Hypertext Webster Gateway: "nightshade"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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}.
From WordNet (r) 1.7 (wn)
nightshade
n : any of numerous shrubs or herbs or vines of the genus
Solanum; most are poisonous though many bear edible fruit
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