• WordNet 3.6
    • n sneezewort Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered
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Webster's Revised Unabridged Dictionary
    • n Sneezewort (Bot) A European herbaceous plant (Achillea Ptarmica) allied to the yarrow, having a strong, pungent smell.
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Century Dictionary and Cyclopedia
    • n sneezewort In old usage, the white hellebore, Veratrum album, more often under the form neezewort. Britten and Holland, Eng. Plant Names.
    • n sneezewort A (composite herb, Achillea Ptarmica, chiefly of the Old World. The flower-heads are larger and much fewer than those of the yarrow, A. Millefolium; the leaves are simple and sharply serrate, and when dried and pulverized are said to provoke sneezing (whence the name).
    • n sneezewort Same as sneezeweed.
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In literature:

The stem of the Sneezewort is very sturdy.
"Flowers Shown to the Children" by C. E. Smith