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milk thistle

DEFINITIONS OF: milk thistle

1

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:
sow thistle
Types:
Sonchus oleraceus, milkweed
annual Eurasian sow thistle with soft spiny leaves and rayed yellow flower heads
Type of:
bush, shrub
a low woody perennial plant usually having several major stems

n tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America

Synonyms:
Our Lady's mild thistle, Silybum marianum, blessed thistle, holy thistle, lady's thistle
Type of:
herb, herbaceous plant
a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
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