milk thistle
1.
(
noun
) 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
Related Words:
herb
,
herbaceous plant
2.
(
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
Synonyms:
sow thistle
Related Words:
Sonchus oleraceus
,
bush
,
milkweed
,
shrub
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