A genus of Eurasian herbs of the family Compositae with prickly foliage and large purplish flowers

Wiktionary Word definitions in Wiktionary
n. (context botany English) Any of the genus ''Onopordum'' of asteraceous thistles.

Wikipedia Word definitions in Wikipedia
Onopordum L. , cottonthistle , is a genus of plants in the thistle tribe within the Asteraceae . They are native to southern Europe , northern Africa , the Canary Islands , the Caucasus , and southwest and central Asia . They grow on disturbed land, roadsides, ...