Bull Thistle Definition
noun
A biennial Eurasian thistle (Cirsium vulgare) in the composite family, naturalized in North America and having heads of purplish flowers and spiny stems and leaves.
American Heritage
Spear thistle.
Wiktionary
Synonyms:
- Cirsium lanceolatum
- Cirsium vulgare
- boar thistle
- spear-thistle
Other Word Forms of Bull Thistle
Noun
Singular:
bull thistle
Plural:
bull-thistlesOrigin of Bull Thistle
From its large head
From American Heritage Dictionary of the English Language, 5th Edition
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