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treacle mustard

noun

  1. a N temperate cruciferous annual plant, Erysimum cheiranthoides , having small yellow flowers. It is a common weed in cultivated ground
“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


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Word History and Origins

Origin of treacle mustard1

C16: so called because of its alleged medicinal properties. See treacle

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