milk-thistle
Nouns
- (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 sow thistle,
- (n) tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America blessed thistle, holy thistle, lady's thistle, Our Lady's mild thistle, Silybum marianum,