WordWeb Online

1. A weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized
   - lesser knapweed, black knapweed, Centaurea nigra

1. [Brit] Knapweed
    
2. One who is hardheaded
    
3. An Australian diving duck
    
4. A California salmon; the steelhead
    
5. (metallurgy) residual ore that failed to melt during a smelting process

Type of: knapweed

Encyclopedia: Hardhead