a strong-smelling, white-flowered plant (Achillea ptarmica) of the composite family, with leaves and flowers formerly used in medicine
See sneezewort in American Heritage Dictionary 4
(snēzˈwûrtˌ, -wôrtˌ)
noun
A Eurasian herb (Achillea ptarmica) of the composite family, having aromatic, linear, finely serrate leaves and clusters of white flower heads grouped in corymbs. Also called sneezeweed.