| sneezeweed yarrow | (n) Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered, Syn. sneezewort, Achillea ptarmica |
| Sneezewort | n. (Bot.) A European herbaceous plant (Achillea Ptarmica) allied to the yarrow, having a strong, pungent smell. [ 1913 Webster ] |