a Eurasian plant, Achillea ptarmica, having daisy-like flowers and long grey-green leaves, which cause sneezing when powdered: family Asteraceae (composites)
See also yarrow
sneezewort in American English
(snizˌwɜrt)
US
noun
a strong-smelling, white-flowered plant (Achillea ptarmica) of the composite family, with leaves and flowers formerly used in medicine