Sneezewort \Sneeze"wort`\, n. (Bot.) A European herbaceous plant ({Achillea Ptarmica}) allied to the yarrow, having a strong, pungent smell.
Achillea ptarmica n : Eurasian herb having loose heads of button-shaped white flowers and long gray-green leaves that cause sneezing when powdered [syn: {sneezeweed yarrow}, {sneezewort}]