1. Tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America
   - milk thistle, lady's thistle, Our Lady's mild thistle, holy thistle, Silybum marianum 
2. Annual of Mediterranean to Portugal having hairy stems and minutely spiny-toothed leaves and large heads of yellow flowers
   - sweet sultan, Cnicus benedictus

Derived forms: blessed thistles

Type of: herb, herbaceous plant, thistle

Part of: Cnicus, genus Cnicus, genus Silybum, Silybum

Encyclopedia: Blessed thistle

• uncalled-for
• uncamphorated
• uncannily
• uncanny
• uncap
• uncapped
• uncarbonated
• uncared-for
• uncaring
• uncarpeted
• uncarved
• uncase
• uncastrated
• uncategorised
• uncategorized
• uncaulked
• uncaused
• unceasing
• unceasingly
• uncensored
• unceremonial
• unceremonious
• unceremoniously
• unceremoniousness
• uncertain