(n) perennial Eurasian herb with reddish bell-shaped flowers and shining black berries; extensively grown in United States; roots and leaves yield atropine, Syn. deadly nightshade, belladonna plant, Atropa belladonna
{ } a. [ Gr. &unr_; up + &unr_; to turn. ] (Bot.) Having the ovule inverted at an early period in its development, so that the chalaza is as the apparent apex; -- opposed to orthotropous. Gray. [ 1913 Webster ]