Achillea
noun
Achil·lea
| \ ˌak-ə-ˈlē-ə, ə-ˈkil-ē-ə
\
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Medical Definition of Achillea
: a large genus of temperate composite herbs of the northern hemisphere that have divided leaves and small heads of disk and ray flowers, are a source of achilleine, and include one (A. millefolium) formerly widely used as a medicinal herb