Dictionary
milk thistle
noun
Definition of MILK THISTLE
: a tall thistle (Silybum marianum) having white-veined dark green leaves and large purple flower heads that is native to the Mediterranean region but has become naturalized elsewhere including the United States; also : an extract of milk thistle and especially its seeds that is held to protect the liver from damage or disease
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First Known Use of MILK THISTLE
1562
Medical Dictionary
milk thistle
noun milk this·tle \-ˈthis-əl\
Medical Definition of MILK THISTLE
: a tall thistle (Silybum marianum) that is the source of silymarin, has large clasping white-blotched leaves and large purple flower heads with bristly receptacles, and is native to southern Europe but has been widely introduced elsewhere including the United States
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