'Sneezewort' definitions:

Definition of 'sneezewort'

(from WordNet)
noun
Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered [syn: sneezeweed yarrow, sneezewort, Achillea ptarmica]

Definition of 'Sneezewort'

From: GCIDE
  • Sneezewort \Sneeze"wort`\, n. (Bot.) A European herbaceous plant (Achillea Ptarmica) allied to the yarrow, having a strong, pungent smell. [1913 Webster]