Meaning of SOW THISTLE

WordNet Dictionary
	Definition:		[n]  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
	Synonyms:		milk thistle
	See Also:		bush, genus Sonchus, milkweed, shrub, Sonchus, Sonchus oleraceus