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9 ENTRIES FOUND:

ragweed

noun rag·weed \-ˌwēd\

: any one of a group of North American plants that release a lot of pollen into the air and that can cause allergic reactions in some people

Full Definition of RAGWEED

:  any of various chiefly North American weedy composite herbs (genus Ambrosia) that produce highly allergenic pollen

Illustration of RAGWEED

First Known Use of RAGWEED

1790

ragweed

noun rag·weed \ˈrag-ˌwēd\   (Medical Dictionary)

Medical Definition of RAGWEED

:  any of various chiefly North American weedy herbaceous plants comprising the genus Ambrosia and producing highly allergenic pollen responsible for much hay fever and asthma: as a :  an annual weed (A. artemisiifolia) with finely divided foliage that is common on open or cultivated ground in much of North America b :  a coarse annual (A. trifida) with some or all of the leaves usually deeply and palmately 3-cleft or 5-cleft—called also great ragweed

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April 27, 2015
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