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English-Thai Dictionary

knapweed

N พืช มีด อก พวก Centaurea

Webster's 1828 Dictionary

KNAPWEED

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

Webster's 1913 Dictionary

KNAPWEED

KNAPWEED Knap "weed `, n. (Bot. )

Defn: The black centaury (Centaurea nigra ); -- so called from the knoblike heads of flowers. Called also bullweed.

New American Oxford Dictionary

knapweed

knap weed |ˈnapˌwēd ˈnæpwid | ▶noun a tough-stemmed plant of the daisy family that typically has purple thistlelike flower heads, occurring typically in grassland and on roadsides. [Genus Centaurea, family Compositae: several species, including the widespread black knapweed (C. nigra ) (also called hardheads ). ] ORIGIN late Middle English (originally as knopweed ): from knop (because of its hard rounded involucre or “head ”) + weed .

Oxford Dictionary

knapweed

knap |weed |ˈnapwiːd | ▶noun [ mass noun ] a tough-stemmed Eurasian plant that typically has purple thistle-like flower heads, occurring chiefly in grassland and on roadsides. ●Genus Centaurea, family Compositae: several species, including the widespread common (or lesser ) knapweed (C. nigra ) (also called hardheads ). ORIGIN late Middle English (originally as knopweed ): from knop (because of its hard rounded involucre or ‘head ’) + weed .