noun
1. tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America
• Syn: ↑milk thistle, ↑lady's thistle, ↑Our Lady's mild thistle, ↑holy thistle, ↑Silybum marianum
• Hypernyms: ↑herb, ↑herbaceous plant
• Member Holonyms: ↑Silybum, ↑genus Silybum
2. annual of Mediterranean to Portugal having hairy stems and minutely spiny-toothed leaves and large heads of yellow flowers
• Syn: ↑sweet sultan, ↑Cnicus benedictus
• Hypernyms: ↑thistle
• Member Holonyms: ↑Cnicus, ↑genus Cnicus
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\\-sə̇d-\ noun1. : an annual pubescent herb (Cnicus benedictus) with large heads of yellow flowers
2. : milk thistle 1
Useful english dictionary. 2012.