Noun has 2 senses

• blessed thistle(n = noun.plant) holy thistle, lady's thistle, milk thistle, our lady's mild thistle, silybum marianum - tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America;



• blessed thistle(n = noun.plant) cnicus benedictus, sweet sultan - annual of Mediterranean to Portugal having hairy stems and minutely spiny-toothed leaves and large heads of yellow flowers;