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, blessed thistle, Silybum marianum

Derived forms: holy thistles

Type of: herb, herbaceous plant

Part of: genus Silybum, Silybum

Encyclopedia: Holy thistle

• monotonous
• monotonously
• monotonousness
• monotony
• Monotremata
• monotreme
• Monotropa
• Monotropa hypopithys
• Monotropa uniflora
• Monotropaceae
• monotype
• monotypic
• monounsaturated
• monounsaturated fatty acid
• monovalent
• monovular
• monoxide
• monozygotic
• monozygotic twin
• monozygous twin
• Monro's foramen
• Monroe
• Monroe Doctrine
• Monrovia
• mons