rag·weed /-ˌwid/
豕草類
rag·weed /ˈrægˌwɪd/ 名詞
豕草,豕草屬
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.
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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]