| achillea | (n) any of several plants of the genus Achillea native to Europe and having small white flowers in flat-topped flower heads |
| genus achillea | (n) perennial often aromatic and sometimes mat-forming herbs of north temperate regions: yarrow; milfoil |
| 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 |
| yarrow | (n) ubiquitous strong-scented mat-forming Eurasian herb of wasteland, hedgerow or pasture having narrow serrate leaves and small usually white florets; widely naturalized in North America, Syn. milfoil, Achillea millefolium |