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Ragweed Information
Learn About Ragweed and How it May be Causing Nasal Allergies.
www.Nasal-Allergies.com
Learn About Ragweed and How it May be Causing Nasal Allergies.
www.Nasal-Allergies.com
rag⋅weed
[rag-weed] 
–noun
| any of the composite plants of the genus Ambrosia, the airborne pollen of which is the most prevalent cause of autumnal hay fever, as the common North American species, A. trifida (great ragweed or giant ragweed) and A. artemisiifolia. |
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To ragweed
| rag·weed (rāg'wēd') n.
[From the ragged shape of its leaves.] |
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Ragweed
Rag"weed\, n. (Bot.) A common American composite weed (Ambrosia artemisi[ae]folia) with finely divided leaves; hogweed. Great ragweed, a coarse American herb (Ambrosia trifida), with rough three-lobed opposite leaves.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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ragweed
1790, from ragged (q.v.), so called from shape of the leaves. Applied to a different plant, ragwort, from 1658. Ragwort itself is attested from c.1450.
Online Etymology Dictionary, © 2001 Douglas Harper
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Main Entry: rag·weed
Pronunciation: 'rag-"wEd
Function: noun
: any of various chiefly No. American weedy herbaceous plants comprising the genusAmbrosia and producing highly allergenic pollen responsible for much hay fever and asthma: as a : an annual weed (A. artemisiifolia) with finely divided foliage that iscommon on open or cultivated ground in much of No. America b : a coarse annual (A. trifida) with some or all of the leaves usually deeply and palmately 3-cleft or 5-cleft calledalso great ragweed
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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ragweed rag·weed (rāg'wēd')
n.
Any of various weeds of the genus Ambrosia having small greenish unisexual flower heads and producing abundant pollen that is one of the chief causes of hay fever.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2009, Dictionary.com, LLC. All rights reserved.
