• WordNet 3.6
    • n sneezeweed any of various plants of the genus Helenium characteristically causing sneezing
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Webster's Revised Unabridged Dictionary
    • n Sneezeweed (Bot) A yellow-flowered composite plant (Helenium autumnale) the odor of which is said to cause sneezing.
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Century Dictionary and Cyclopedia
    • n sneezeweed A plant of the genus Helenium, mostly the common H. autumnale. In England this, though rather coarse, is known in ornamental culture. Its powdered leaves and flowers when snuffed up produce violent sneezing. Recently the finer southwestern species, H. tenuifolium, has received some notice. It is poisonous to human beings and to horses. Both plants have been advocated for medical use in nervous diseases. Less properly called sneezewort See cut under Helenium.
    • n sneezeweed In Australia, a dwarf, erect, odorous herb of the aster family, Centipeda Cunninghamii, considered a valuable specific for certain diseases of the eye.
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Chambers's Twentieth Century Dictionary
    • ns Sneezeweed any species of Helenium
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Chambers's Twentieth Century Dictionary
M. E. snesen, fnesen—A.S. fneósan, to sneeze; Dut. fniezen.


In literature:

Of Sneezeweed (Helenium), with its pappus of five scales.
"The Elements of Botany" by Asa Gray