blue thistle | sense examples, Usage and Definition from wordnet dictionary online

Noun blue thistle has 1 sense

blueweed, blue devil, blue thistle, viper's bugloss, Echium vulgare - a coarse prickly European weed with spikes of blue flowers; naturalized in United States
--₁ is a kind of herb, herbaceous plant
--₁ is a member of Echium, genus Echium