deadly nightshade

Multiple Entries:
  deadly nightshade    nightshade  

Concise Oxford English Dictionary © 2008 Oxford University Press:
deadly nightshade/dedliˈnʌɪtʃeɪd/

▶noun a poisonous bushy plant with drooping purple flowers and black cherry-like fruit. [Atropa belladonna.]

Concise Oxford English Dictionary © 2008 Oxford University Press:
nightshade/ˈnʌɪtʃeɪd/

▶noun used in the names of a group of poisonous or narcotic plants, e.g. deadly nightshade.

– origin OE nihtscada, appar. from night + shade, prob. with ref. to dark and poisonous berries.