ragweed

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ragweed

(răg′wēd′)
n.
1. Any of various weeds of the genus Ambrosia of the composite family, having small, greenish, unisexual flower heads and producing abundant pollen that is one of the chief causes of hay fever.
2. Chiefly British Ragwort.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ragweed

A plant of the family Compositae, the pollen from which is highly allergenic and the most common cause of allergic rhinitis.
 
Diagnosis
Bronchial provocation testing, in which pollen is inhaled through a dosimeter.
 
Management
Avoidance of pollens by staying indoors; use of cromolyn, antihistamines, sympathomimetics, theophylline and corticosteroids.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

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
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Vegetation of Las Vegas Valley was classified as creosote bush-white bursage association.
Creosote bush and white bursage formed leaves early, but flowered approximately eight weeks after leaf initiation in both nest and adjacent non-nest areas (Tables 2-3).
ramosissima elevational boundary through the upper portions of the creosote bush-white bursage (Larrea tridentata-Ambro sia dumosa) zone.
Although white bursage (Ambrosia dumosa) was the most abundant species in the community, Cuscuta showed the highest frequency of infestation on Larrea.
Cuscuta californica occurs frequently on white bursage (Ambrosia dumosa) (Beauchamp 1986).
tridentata-Ambrosia dumosa (white bursage) shrubland is a common vegetation type in the Mojave Desert of southern California.
Other woody species are sparsely distributed in this vegetation zone, including white bursage (A.