01 n. A common American composite weed (Ambrosia artemisiaefolia) with finely divided leaves; hogweed.
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1.
A common American composite weed (Ambrosia artemisiaefolia) with finely divided leaves; hogweed.(Bot.)
Phrases & compounds
Great ragweed —
a coarse American herb (Ambrosia trifida), with rough three-lobed opposite leaves.