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Definition of Sow thistle
1. Noun. 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.
Exact synonyms: Milk Thistle
Group relationships: Genus Sonchus, Sonchus
Specialized synonyms: Milkweed, Sonchus Oleraceus
Generic synonyms: Bush, Shrub
Group relationships: Genus Sonchus, Sonchus
Specialized synonyms: Milkweed, Sonchus Oleraceus
Generic synonyms: Bush, Shrub
Definition of Sow thistle
1. Noun. Any of the thistles in one of the genera ''Cicerbita'' and ''Sonchus''. ¹
¹ Source: wiktionary.com