milk thistle definition

  • noun:
    • Any of the thistles when you look at the genus Silybum.
    • an esculent European thistle (Silybum marianum), getting the veins of their leaves of a milky whiteness.
    • A thistle-like plant, Silybum (Carduus) Marianum, local in southern European countries, somewhat cultivated and spontaneous somewhere else. The leaves tend to be variegated with white. Sometimes called lady's-thistle.
    • any of several Old World coarse prickly-leaved bushes and subshrubs having milky liquid and yellowish flowers; commonly naturalized; frequently noxious weeds in cultivated soil
    • tall Old World biennial thistle with large clasping white-blotched leaves and purple rose heads; naturalized in California and south usa

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