WordNet (r) 3.0 (2006):

poisonous nightshade
    n 1: poisonous perennial Old World vine having violet flowers
         and oval coral-red berries; widespread weed in North
         America [syn: bittersweet, bittersweet nightshade,
         climbing nightshade, deadly nightshade, poisonous
         nightshade, woody nightshade, Solanum dulcamara]