knapweed
noun/ˈnæpwiːd/
Etymology Alteration of knopweed.
1
Any of various common weeds of, or formerly of, the genus Centaurea.
- Near-synonym: hardhead
2
Centaurea nigra.
3
Rhaponticum repens.
4
Centaurea calcitrapa.
- Derived terms
- bighead knapweed, black knapweed, brown knapweed, common knapweed, diffuse knapweed, giant knapweed, greater knapweed, great knapweed, Jersey knapweed, lesser knapweed, Russian knapweed, singleflower knapweed, slender knapweed, spotted knapweed, squarrose knapweed, tumble knapweed, white knapweed