a common weed, Solanum nigrum, of the nightshade family, having poisonous leaves, white flowers, and black edible berries.
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Origin of black nightshade
First recorded in 1810–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for black nightshade
a poisonous solanaceous plant, Solanum nigrum, a common weed in cultivated land, having small white flowers with backward-curved petals and black berry-like fruits
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012