Cotton thistle Meaning, Definition & Usage

  1. noun biennial Eurasian white hairy thistle having pale purple flowers; naturalized in North America
    woolly thistle; Scotch thistle; Onopordon acanthium; Onopordum acanthium.

WordNet

Definitions
  1. Onopordon Acanthium.
Definitions
  1. (Bot.), the Scotch thistle. See under Thistle.

Webster 1913