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ragweed
ragweed any plant of the genus Ambrosia, coarse, weedy herbs belonging to the family Asteraceae ( aster family), most of which are native to America. They have inconspicuous greenish flowers and soft subdivided leaves. Ragweeds are regarded as especially troublesome because their pollen is acknowledged as the primary cause of hay fever—especially the pollen of A. artemisiifolia (common ragweed) and A. trifida (great ragweed), the two most prevalent species in North America. The leaves of the common ragweed were formerly used as an astringent and hemostatic; they sometimes impart a bitter taste to milk if eaten by cattle. One variety ( elatior ) of this species has become widely naturalized in Europe. Ragweeds are classified in the division Magnoliophyta , class Magnoliopsida, order Asterales, family Asteraceae. |
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"ragweed." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "ragweed." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1E1-ragweed.html "ragweed." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-ragweed.html |
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ragweed
rag·weed / ˈragˌwēd/ • n. a North American plant (Ambrosia artemisia) of the daisy family. Its tiny green flowers produce copious amounts of pollen, making it a major causative agent of hay fever. |
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"ragweed." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "ragweed." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O999-ragweed.html "ragweed." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-ragweed.html |
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ragweed
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T. F. HOAD. "ragweed." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. T. F. HOAD. "ragweed." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O27-ragweed.html T. F. HOAD. "ragweed." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-ragweed.html |
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ragweed
ragweed •accede, bead, Bede, bleed, breed, cede, concede, creed, deed, Eid, exceed, feed, Gide, God speed, greed, he'd, heed, impede, interbreed, intercede, Jamshid, knead, lead, mead, Mede, meed, misdeed, mislead, misread, need, plead, proceed, read, rede, reed, Reid, retrocede, screed, secede, seed, she'd, speed, stampede, steed, succeed, supersede, Swede, tweed, weak-kneed, we'd, weed
•breastfeed • greenfeed • dripfeed
•chickenfeed • spoonfeed • nosebleed
•Nibelungenlied • invalid • Ganymede
•Runnymede • airspeed • millipede
•velocipede • centipede • Siegfried
•filigreed • copyread • crossbreed
•proofread • flaxseed • hayseed
•rapeseed • linseed • pumpkinseed
•aniseed • oilseed • birdseed • ragweed
•knapweed • seaweed • chickweed
•stinkweed • blanket weed • bindweed
•pondweed • duckweed • tumbleweed
•fireweed • waterweed • silverweed
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Cite this article
"ragweed." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "ragweed." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O233-ragweed.html "ragweed." Oxford Dictionary of Rhymes. 2007. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-ragweed.html |
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