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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 rag·weed /-ˌwid/
 豕草類

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 rag·weed /ˈrægˌwɪd/ 名詞
 豕草,豕草屬

From: Webster's Revised Unabridged Dictionary (1913)

 Rag·weed n. Bot. A common American composite weed (Ambrosia artemisiaefolia) with finely divided leaves; hogweed.
 Great ragweed, a coarse American herb (Ambrosia trifida), with rough three-lobed opposite leaves.
 

From: WordNet (r) 2.0

 ragweed
      n 1: widespread European weed having yellow daisylike flowers;
           sometimes an obnoxious weed and toxic to cattle if
           consumed in quantity [syn: ragwort, tansy ragwort, benweed,
            Senecio jacobaea]
      2: any of numerous chiefly North American weedy plants
         constituting the genus Ambrosia that produce highly
         allergenic pollen responsible for much hay fever and
         asthma [syn: ambrosia, bitterweed]