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.