milk thistle

noun
Updated on: 8 Nov 2017

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 U.S.; also :an extract of milk thistle and especially its seeds that is held to protect the liver from damage or disease

Recent Examples of milk thistle from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'milk thistle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of milk thistle

1562


Medical Dictionary

milk thistle

noun milk this·tle \ -ˈthis-əl \

medical Definition of milk thistle

1 :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
2 :an extract of milk thistle and especially its seeds :silymarin

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