Definition of erigeron
: any of a widely distributed genus (Erigeron) of composite herbs with flower heads that resemble asters but have fewer and narrower involucral bracts
Medical Definition of erigeron
1 capitalized : a widely distributed genus of composite herbs having flower heads resembling asters
2a: any plant of the genus Erigeronb: the leaves and tops of plants of the genus Erigeron occasionally and especially formerly used as a diuretic and as a hemostatic in uterine hemorrhagec: erigeron oil
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