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Any of various plants of the genus Sonchus of the composite family, native to Eurasia and Africa but widespread as weeds, having prickly leaves, milky sap, and yellow flower heads.
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) any of various plants of the Old World genus Sonchus, esp S. oleraceus, having milky juice, prickly leaves, and heads of yellow flowers: family Asteraceae (composites). Also called: milk thistle, puha (NZ) or rauriki (NZ)
[C13: from sugethistel, perhaps variant of Old English thugethistel, thuthistel thowthistle, a dialect name of the sow thistle. See sow2, thistle]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any composite plant belonging to the genus Sonchus, esp. S. oleraceus, a weed having thistlelike leaves, yellow flowers, and a milky juice.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||sow thistle - any of several Old World coarse prickly-leaved shrubs and subshrubs having milky juice and yellow flowers; widely naturalized; often noxious weeds in cultivated soil|
Sonchus oleraceus, milkweed - annual Eurasian sow thistle with soft spiny leaves and rayed yellow flower heads
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