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An annual plant (Lapsana communis) in the composite family, native to Eurasia and naturalized in North America, having small yellow flower heads.
[From its former use in folk medicine to treat breast tumors.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Plants) an annual Eurasian plant, Lapsana communis, with pointed oval leaves and small yellow flower heads: family Asteraceae (composites)
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014