Noun: thistle thi-sul
- Any of numerous plants of the family Compositae and especially of the genera Carduus and Cirsium and Onopordum having prickly-edged leaves
"The thistle is the national emblem of Scotland"
Derived forms: thistles
Type of: weed
Part of: aster family, Asteraceae, Compositae, family Asteraceae, family Compositae
Encyclopedia: Thistle, Ut