Definition of ironweed in English:

ironweed

noun ˈʌɪənwiːd

Any of various plants growing as weeds of cultivated land and typically having tough or wiry stems; specifically (a) black or common knapweed, Centaurea nigra (now rare); (b) North American any of several species of the genus Vernonia (family Asteraceae (Compositae)).

Early 19th century; earliest use found in Thomas Batchelor (1775–1838), farmer and writer on language. From iron + weed.

nounˈʌɪənwiːd

Any of various plants growing as weeds of cultivated land and typically having tough or wiry stems; specifically (a) black or common knapweed, Centaurea nigra (now rare); (b) North American any of several species of the genus Vernonia (family Asteraceae (Compositae)).

Early 19th century; earliest use found in Thomas Batchelor (1775–1838), farmer and writer on language. From iron + weed.

单词	ironweed
释义	Definition of ironweed in English: ironweed noun ˈʌɪənwiːd Any of various plants growing as weeds of cultivated land and typically having tough or wiry stems; specifically (a) black or common knapweed, Centaurea nigra (now rare); (b) North American any of several species of the genus Vernonia (family Asteraceae (Compositae)). Origin Early 19th century; earliest use found in Thomas Batchelor (1775–1838), farmer and writer on language. From iron + weed. Definition of ironweed in US English: ironweed nounˈʌɪənwiːd Any of various plants growing as weeds of cultivated land and typically having tough or wiry stems; specifically (a) black or common knapweed, Centaurea nigra (now rare); (b) North American any of several species of the genus Vernonia (family Asteraceae (Compositae)). Origin Early 19th century; earliest use found in Thomas Batchelor (1775–1838), farmer and writer on language. From iron + weed.
随便看	undetectably undetected undetermined undeterred undeterred by undetonated undeveloped undeviating undeviatingly undeviatingly undiagnosed undid undid undies undiess undifferenced undifferentiated undigested undignified undignified for undignify undiluted undiminished undimmed undinal