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Webster 1913 Edition

Knapweed

Knap′weedˊ

,
Noun.
(Bot.)
The black centaury (
Centaurea nigra
); – so called from the knoblike heads of flowers. Called also
bullweed
.

Webster 1828 Edition

Knapweed

KNAP'WEED

,
Noun.
nap'weed. A plant of the genus Centaurea, so called probably from knap, a button.

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