ragweed

rag·weed (rgwd)

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.

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ragweed

[rag′wēd]

Etymology: ME, ragge, rag + AS, weod, herb, grass, weed

any of various species of plants of the genus Ambrosia whose pollen can cause hay fever.

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ragweed,

n Latin names:
Ambrosia artemisifolia, Ambrosia trifida. An annual weed that blooms in the fall and is implicated as the primary cause of hay fever.

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ragweed

see artemisia, a name sometimes used for senecio but more commonly ambrosia elatir, or Franseria discolor (white ragweed).

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ragweed

Ambrosia artemisiifolia Allergy medicine Any of the weedy composite herbs of family Compositae, the pollen from which is highly allergenic Diagnosis Bronchial provocation testing, in which pollen is inhaled through a dosimeter Management Avoid pollen, stay indoors, cromolyn, antihistamines, sympathomimetics, theophylline, corticosteroids Drug slang A street term for low quality marijuana or heroin